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OpenStudy (anonymous):
Give the power series representation of pi. Hint:\[\frac{d \tan^{-1}x}{dx} = \frac{1}{1 + x^{2}}\]
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OpenStudy (anonymous):
pi =4 arctan(1) pi/4 = 1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11 + ...
OpenStudy (anonymous):
good job!
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