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Post by Hydrochloric Acid on May 21, 2015 9:42:01 GMT
Explain this: x=.99…
10x=9.99…
10x-x=9.99…-.99…
9x=9
x=1
.99…=1?
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Post by 《§》carbonara <3〖ƧƐ〗 on May 21, 2015 9:47:12 GMT
Explain this: x=.99… 10x=9.99… 10x-x=9.99…-.99… 9x=9 x=1 .99…=1? Can you first prove that simplification really works on infinite numbers? ( ͡° ͜ʖ ͡°) |
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Post by Hydrochloric Acid on May 21, 2015 9:55:50 GMT
Explain this: x=.99… 10x=9.99… 10x-x=9.99…-.99… 9x=9 x=1 .99…=1? Can you first prove that simplification really works on infinite numbers? ( ͡° ͜ʖ ͡°) x-x=0. If the same digit x appears in the same decimal place in two numbers to be subtracted, that law will apply. Since the same digit goes on infinitely after the decimal point of the two numbers, it would be safe to assume that if we subtract the two numbers, the result would have no decimal point (i hate essays, ok?) |
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Post by P1kachu on May 21, 2015 10:19:02 GMT
Explain this: x=.99… 10x=9.99… 10x-x=9.99…-.99… 9x=9 x=1 .99…=1? Because .99... is equal to 1! Since 1 - .99... = .00... which is also equal to ε Where ε is a really, really small number close to 0. Therefore, .99... is actually equal to 1. |
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Post by 《§》carbonara <3〖ƧƐ〗 on May 21, 2015 14:23:55 GMT
Explain this: x=.99… 10x=9.99… 10x-x=9.99…-.99… 9x=9 x=1 .99…=1? Because .99... is equal to 1! Since 1 - .99... = .00... which is also equal to ε Where ε is a really, really small number close to 0. Therefore, .99... is actually equal to 1. ... no, all these equations have a low degree of mathematical riguor, otherwise 9.999... - 0.999... is NOT equal to 9, using substraction like this is forbidden in rigorous maths |
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Post by P1kachu on May 22, 2015 0:04:12 GMT
Because .99... is equal to 1! Since 1 - .99... = .00... which is also equal to ε Where ε is a really, really small number close to 0. Therefore, .99... is actually equal to 1. ... no, all these equations have a low degree of mathematical riguor, otherwise 9.999... - 0.999... is NOT equal to 9, using substraction like this is forbidden in rigorous maths But my teacher told me that... ( ͡° ͜ʖ ͡°) |
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Post by 《§》carbonara <3〖ƧƐ〗 on May 22, 2015 16:13:04 GMT
... no, all these equations have a low degree of mathematical riguor, otherwise 9.999... - 0.999... is NOT equal to 9, using substraction like this is forbidden in rigorous maths But my teacher told me that... ... with a low degree of riguor he is true ( ͡° ͜ʖ ͡°) |
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Post by Miguel888 on May 22, 2015 16:25:12 GMT
This is a test paper in Math at my school. It is WAY easier than the all the Math things you guys are talking about. My Math is Singaporean Math so thats why it may be different Attachments:
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Post by P1kachu on May 22, 2015 23:23:17 GMT
This is a test paper in Math at my school. It is WAY easier than the all the Math things you guys are talking about. My Math is Singaporean Math so thats why it may be different Those are similar to the questions in my Grade 5 test paper ._. |
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Post by Miguel888 on May 23, 2015 6:17:03 GMT
This is a test paper in Math at my school. It is WAY easier than the all the Math things you guys are talking about. My Math is Singaporean Math so thats why it may be different Those are similar to the questions in my Grade 5 test paper ._. Really? That was my test paper for grade 7. Why are you so advanced? My school is private and that test paper was given in the 2nd qtr. |
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Post by 《§》carbonara <3〖ƧƐ〗 on May 23, 2015 12:34:12 GMT
Those are similar to the questions in my Grade 5 test paper ._. Really? That was my test paper for grade 7. Why are you so advanced? My school is private and that test paper was given in the 2nd qtr. its ultra easy  I have way more difficult things |
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Post by P1kachu on May 23, 2015 12:34:45 GMT
Really? That was my test paper for grade 7. Why are you so advanced? My school is private and that test paper was given in the 2nd qtr. its ultra easy I have way more difficult things Calculus. ( ͡° ͜ʖ ͡°) |
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Post by 《§》carbonara <3〖ƧƐ〗 on May 23, 2015 12:35:56 GMT
its ultra easy I have way more difficult things Calculus. ( ͡° ͜ʖ ͡°) Graph Theory |
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Post by P1kachu on May 23, 2015 12:36:27 GMT
It is also part of Calculus ( ͡° ͜ʖ ͡°) |
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Post by 《§》carbonara <3〖ƧƐ〗 on May 23, 2015 12:37:00 GMT
It is also part of Calculus ( ͡° ͜ʖ ͡°) ikr ( ͡° ͜ʖ ͡°) calculus is eZ |
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I have way more difficult things