Math: 6÷2(1+2) = ? | |
Anonymous Coward User ID: 32057798 Canada 01/17/2013 10:44 PM Report Abusive Post Report Copyright Violation | |
Anonymous Coward User ID: 31557420 United States 01/17/2013 10:47 PM Report Abusive Post Report Copyright Violation | 6÷2(1+n) When you want to eliminate the parentheses by distribution, are you first going to distribute the 2 or divide 6 by 2? obviously divide 6 by 2. Quoting: Anonymous Coward 31557420 Now why would you put the (1+n) in the denominator? If it is supposed to be there it should be written there in a fraction or be power to ^-1 Can you read? I explained why you cannot divide first. It is on the right side of the obelus, hence it ALREADY IS ^-1 Do I have to show you the math basics too?? 6 ÷ 2n = 6 * (2n)^-1 If I wanted (2+1) to be in the numerator, I would write: 6(2+1)÷2 How basic is that? This is exactly what we are arguing over here: [link to www.matthewcompher.com] |
Anonymous Coward User ID: 32424557 Australia 01/17/2013 10:50 PM Report Abusive Post Report Copyright Violation | I bet none of you half wits can do any of these 3 simple algebra equations: Quoting: Anonymous Coward 32057798 [link to i50.tinypic.com] Here is what I got: 1. 9y^2 z^6/x^2 (that's meant to be fraction, as in it's over x^2) 2. 17a^2 b^2 x 3. x = 1/4y2 + y |
Anonymous Coward User ID: 31557420 United States 01/17/2013 10:51 PM Report Abusive Post Report Copyright Violation | 6÷2(1+n) When you want to eliminate the parentheses by distribution, are you first going to distribute the 2 or divide 6 by 2? obviously divide 6 by 2. Quoting: Anonymous Coward 31557420 Now why would you put the (1+n) in the denominator? If it is supposed to be there it should be written there in a fraction or be power to ^-1 Can you read? I explained why you cannot divide first. It is on the right side of the obelus, hence it ALREADY IS ^-1 Do I have to show you the math basics too?? 6 ÷ 2n = 6 * (2n)^-1 If I wanted (2+1) to be in the numerator, I would write: 6(2+1)÷2 How basic is that? This is exactly what we are arguing over here: [link to www.matthewcompher.com] You read it yet? |
Anonymous Coward User ID: 32057798 Canada 01/17/2013 10:53 PM Report Abusive Post Report Copyright Violation | You have a point, that is how it is always... now I think it has been erroneously so... obviously that seems very unlikely now doesn't it? Quoting: Anonymous Coward 31557420 I need to speak with someone with a PhD in mathematics... I am calling my friend. The best fighter pilots in the world make mistakes. The smartest people in the world make errors. Don't let one PhD convince you his answer is the "right" one. There are several Doctorates still debating this very thing. Trust me. Again, don't think of it how you should enter it into a calculator. That said, even wolfram knows 2n/2n = 1 and 6/2n = 3/n, but then it doesn't know how to properly substitute 2+1 for n. That is because you can't teach logic to computers. Once they are programmed, they will parse a certain way. That said, I see you are now second guessing yourself. That, my friend, takes balls. You have the biggest balls here, for 2 reasons: 1 - admitting you could be wrong 2 - researching more to educate yourself The rest of these guys that refuse to read any further than their own nose, could learn something from you. |
Anonymous Coward User ID: 18119934 Canada 01/17/2013 10:54 PM Report Abusive Post Report Copyright Violation | Copy and paste it into this math solver webpage. See what the computer tells you the answer is. 6÷2(1+2)=y You could sub all of these for variables: 6÷2*(1+2)=y You always do bracket first (that IS the rules). Thus it becomes: 6÷2*(3)=y 6÷2*3=y I think we can all agree on that. OK............. Now let's sub these with some variables: 6÷2*3=y n will now mean 3: 6÷2*n=y Which becomes: 6÷2n=y Let's rearrange to put all variable on one side. 6=2ny Now let's solve for ny 6÷2=ny 3=ny Now let's swap n back with a 3. 3=3y Now let's solve for y. 3=3y 3÷3=y 1=y I still get my same answer (because I followed the proper math-rules). |
Anonymous Coward User ID: 32057798 Canada 01/17/2013 10:56 PM Report Abusive Post Report Copyright Violation | I will read it in a sec. I have researched the exact meaning of the obelus, depicted here: [link to www.freeimagehosting.net] It was used as a grouping symbol. Not that is applies anymore, it was first used like this: 6 ÷ 2 + 1 really meant 6 ÷ (2+1). neither here nor there, but I thought you would find that interesting, i guess. |
Anonymous Coward User ID: 18119934 Canada 01/17/2013 10:56 PM Report Abusive Post Report Copyright Violation | |
fnord User ID: 32102656 United States 01/17/2013 10:58 PM Report Abusive Post Report Copyright Violation | If simple arithmetic is a subject of such controversy, how can we hope to have any rational basis for agreement on any other thought processes? Logical reasoning is useful for a lot of things, but not for deciding what is right or wrong, or true or false. Those decisions must be made by the whole being, in context with the whole Universe. |
Anonymous Coward User ID: 31557420 United States 01/17/2013 11:01 PM Report Abusive Post Report Copyright Violation | I will read it in a sec. I have researched the exact meaning of the obelus, depicted here: [link to www.freeimagehosting.net] It was used as a grouping symbol. Not that is applies anymore, it was first used like this: 6 ÷ 2 + 1 really meant 6 ÷ (2+1). neither here nor there, but I thought you would find that interesting, i guess. I do, and you are right. But it is here and there lol... You are right. I was wrong. My TI83 is wrong, wolfram alpha is wrong... Do you have a source for that image? |
Anonymous Coward User ID: 32057798 Canada 01/17/2013 11:03 PM Report Abusive Post Report Copyright Violation | But again, if you go back to that algebra page I gave you, we group variables together, and even YOU did those math equations using those very same rules, yet you are using a different 'rule' to get your 9, therefore, contradicting yourself. Anyway, I gotta run for now. Sorry for a few snappy remarks at you earlier, I thought you were one of the other guys trolling, then I realized it was you after I replied :D |
Anonymous Coward User ID: 18119934 Canada 01/17/2013 11:03 PM Report Abusive Post Report Copyright Violation | |
Anonymous Coward User ID: 31557420 United States 01/17/2013 11:04 PM Report Abusive Post Report Copyright Violation | I will read it in a sec. I have researched the exact meaning of the obelus, depicted here: [link to www.freeimagehosting.net] It was used as a grouping symbol. Not that is applies anymore, it was first used like this: 6 ÷ 2 + 1 really meant 6 ÷ (2+1). neither here nor there, but I thought you would find that interesting, i guess. The meaning of the obelus is where our problems arose from... And even me googling it doesn't give me a definitive answer, just that blog which leads me to believe you are correct and I have been wrong. |
Anonymous Coward User ID: 31557420 United States 01/17/2013 11:05 PM Report Abusive Post Report Copyright Violation | That is hilarious. He referenced the exact page of the book I found earlier this week. Quoting: Anonymous Coward 32057798 But again, if you go back to that algebra page I gave you, we group variables together, and even YOU did those math equations using those very same rules, yet you are using a different 'rule' to get your 9, therefore, contradicting yourself. Anyway, I gotta run for now. Sorry for a few snappy remarks at you earlier, I thought you were one of the other guys trolling, then I realized it was you after I replied :D All good I gave really shitty responses to people in this thread. Joke is on me, I was wrong. Thanks for your work. If you have anything else on the obelus, post it here. |
Anonymous Coward User ID: 32057798 Canada 01/17/2013 11:08 PM Report Abusive Post Report Copyright Violation | |
caper_26 User ID: 32057798 Canada 01/17/2013 11:11 PM Report Abusive Post Report Copyright Violation | |
Anonymous Coward User ID: 31557420 United States 01/17/2013 11:12 PM Report Abusive Post Report Copyright Violation | |
Anonymous Coward User ID: 31557420 United States 01/17/2013 11:13 PM Report Abusive Post Report Copyright Violation | All good I gave really shitty responses to people in this thread. Joke is on me, I was wrong. Thanks for your work. Quoting: Anonymous Coward 31557420 If you have anything else on the obelus, post it here. I have already, and of course, I was told I was retarded, etc etc. Yup. That was me. Sorry. You were right. I am retarded. |
Anonymous Coward User ID: 32057798 Canada 01/17/2013 11:17 PM Report Abusive Post Report Copyright Violation | All good I gave really shitty responses to people in this thread. Joke is on me, I was wrong. Thanks for your work. Quoting: Anonymous Coward 31557420 If you have anything else on the obelus, post it here. I have already, and of course, I was told I was retarded, etc etc. I am surprised you accept the obelus as the deal breaker, and not the identity property. a / 1a = 1. This is not disputable. Even ask your PhD friend about that. the 1 is there whether you write it or not. Anyone who knows math knows this. Therefore a/a is always 1, and a/1a is always 1. Therefore a/2a MUST be 1/2, and 6/2a is 3/a, and a = 2+1 so 6/2(2+1) = 3/(2+1). The identity law is something we all can read, and accept. For me, that was deal breaker, along with fractional coefficients written with a '/' all use ( ) as well. |
Anonymous Coward User ID: 32057798 Canada 01/17/2013 11:18 PM Report Abusive Post Report Copyright Violation | |
Anonymous Coward User ID: 31557420 United States 01/17/2013 11:19 PM Report Abusive Post Report Copyright Violation | All good I gave really shitty responses to people in this thread. Joke is on me, I was wrong. Thanks for your work. Quoting: Anonymous Coward 31557420 If you have anything else on the obelus, post it here. I have already, and of course, I was told I was retarded, etc etc. I am surprised you accept the obelus as the deal breaker, and not the identity property. a / 1a = 1. This is not disputable. Even ask your PhD friend about that. the 1 is there whether you write it or not. Anyone who knows math knows this. Therefore a/a is always 1, and a/1a is always 1. Therefore a/2a MUST be 1/2, and 6/2a is 3/a, and a = 2+1 so 6/2(2+1) = 3/(2+1). The identity law is something we all can read, and accept. For me, that was deal breaker, along with fractional coefficients written with a '/' all use ( ) as well. I understand, but the original equation was written with an obelus, NOT a solidus... |
Anonymous Coward User ID: 32487741 Malaysia 01/17/2013 11:24 PM Report Abusive Post Report Copyright Violation | |
Anonymous Coward User ID: 31557420 United States 01/17/2013 11:24 PM Report Abusive Post Report Copyright Violation | All good I gave really shitty responses to people in this thread. Joke is on me, I was wrong. Thanks for your work. Quoting: Anonymous Coward 31557420 If you have anything else on the obelus, post it here. I have already, and of course, I was told I was retarded, etc etc. I am surprised you accept the obelus as the deal breaker, and not the identity property. a / 1a = 1. This is not disputable. Even ask your PhD friend about that. the 1 is there whether you write it or not. Anyone who knows math knows this. Therefore a/a is always 1, and a/1a is always 1. Therefore a/2a MUST be 1/2, and 6/2a is 3/a, and a = 2+1 so 6/2(2+1) = 3/(2+1). The identity law is something we all can read, and accept. For me, that was deal breaker, along with fractional coefficients written with a '/' all use ( ) as well. And yes, I understand your point with the identity property as well... I also suppose I thought the identity property is normally written out as a fraction, not with a solidus. Nevertheless I don't even think that matters now... a solidus or an obelus imply a fraction... |
Anonymous Coward User ID: 32057798 Canada 01/17/2013 11:25 PM Report Abusive Post Report Copyright Violation | I understand, but the original equation was written with an obelus, NOT a solidus... Quoting: Anonymous Coward 31557420 But the identity law doesn't change, and is used the same way. a ÷ a = 1 (There is still a 1 in front of both a's) 1a ÷ 1a = 1 (not 1*a÷1*a) therefore, 6 ÷ 2n = 3/n PS: The obelus can be interchanged with a divisional slash, but not as a Solidus. Check this out, forgot I had it: =================================== Obelus: The obelus is primarily used as a symbol for division Quoting: caper_26Slash: Used between numbers slash means division, and in this sense the symbol may be read aloud as "over". Solidus: The solidus <snip due to html coding of symbols> or a shilling mark is a punctuation mark used to indicate fractions. Now, the obelus and slash can be used interchangeably as long as the slash is interpreted as division NOT mistaken for a solidus. In that regard 6÷2n = 6/2n, which MEANS 6/(2n). Let n = 2+1. |
Anonymous Coward User ID: 31557420 United States 01/17/2013 11:26 PM Report Abusive Post Report Copyright Violation | |
Anonymous Coward User ID: 18432713 United States 01/17/2013 11:27 PM Report Abusive Post Report Copyright Violation | |
Syrius (OP) User ID: 19364503 United States 01/17/2013 11:29 PM Report Abusive Post Report Copyright Violation | |
Anonymous Coward User ID: 31557420 United States 01/17/2013 11:29 PM Report Abusive Post Report Copyright Violation | I understand, but the original equation was written with an obelus, NOT a solidus... Quoting: Anonymous Coward 31557420 But the identity law doesn't change, and is used the same way. a ÷ a = 1 (There is still a 1 in front of both a's) 1a ÷ 1a = 1 (not 1*a÷1*a) therefore, 6 ÷ 2n = 3/n PS: The obelus can be interchanged with a divisional slash, but not as a Solidus. Check this out, forgot I had it: =================================== Obelus: The obelus is primarily used as a symbol for division Quoting: caper_26Slash: Used between numbers slash means division, and in this sense the symbol may be read aloud as "over". Solidus: The solidus <snip due to html coding of symbols> or a shilling mark is a punctuation mark used to indicate fractions. Now, the obelus and slash can be used interchangeably as long as the slash is interpreted as division NOT mistaken for a solidus. In that regard 6÷2n = 6/2n, which MEANS 6/(2n). Let n = 2+1. Thank you very very much. And wow, I was even thinking a solidus WAS the same as a slash... |
Anonymous Coward User ID: 31557420 United States 01/17/2013 11:32 PM Report Abusive Post Report Copyright Violation | |
Anonymous Coward User ID: 31557420 United States 01/17/2013 11:32 PM Report Abusive Post Report Copyright Violation | |