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Physics LibreTexts

66.4: Useful Series

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The first four series are valid if |x|<1; the fifth is valid for x2<a2; and the last three are valid for all real x.

(1+x)1/2=1+12x18x2+116x35128x4+7256x5211024x6+332048x742932768x8+ (D.1) (1x)1/2=112x18x2116x35128x47256x5211024x6332048x742932768x8 (D.2) (1+x)1/2=112x+38x2516x3+35128x463256x5+2311024x64292048x7+643532768x8 (D.3) (1x)1/2=1+12x+38x2+516x3+35128x4+63256x5+2311024x6+4292048x7+643532768x8+ (D.4) 1a+x=1axa2+x2a3x3a4+x4a5x5a6+ex=1+x+x22+x36+x424+x5120+x6720+x75040+x840320+x9362880+sinx=xx36+x5120x75040+x9362880x1139916800+x136227020800cosx=1x22+x424x6720+x840320x103628800+x12479001600


66.4: Useful Series is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by LibreTexts.

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