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Find a power series representation for f, and graph several partial sums sn(x) on the same screen for f(x)=tan^-1(2x). What happens as n increases?...

Find a power series representation for f, and graph several partial sums sn(x) on the same screen for f(x)=tan^-1(2x). What happens as n increases? (Yes it gets more accurate)


As per homework solutions #24 section 11.9 8th edition Probably somewhere in the 7th edition too:



Yes that is the derivative above^



What did they do to get here^? (Definitions, words, series tests)



Again what did they do to get here^? If it is a mistake that is okay just fix it. (Definitions, words, series tests)



Again what did they do to get here^? (Definitions, words, series tests)



Again what did they do to get here^? (Definitions, words, series tests)



I DO see^ that simplication that is clear and makes sense.


"This series converges when 


What did they do to get here^? (Definitions, words, series tests) I think it is the ratio test but usually below like you did for the alternating series test you should say by the ratio test the series converges.


"So the interval of convergence is [-1/2, 1/2] because the alternating series test"


Is it [-1/2, 1/2] or (-1/2, 1/2)? I do think the alternating series^ test and some other tests like the ratio test, limit test, direct comparision test, show end point inclusion or exclusion. But again it needs a more clear explanation.


Graphing the rest well I'm fine with that graphing makes sense but none of the stuff before that does.

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