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Tuesday, June 04, 2013

 

Taylor series worth memorizing

About x=0:

  11x=1+x+x2+ex=1+x+x22!+x33!+ln(1+x)=xx22+x33+cosx=1x22!+x44!+sinx=xx33!+x55!+arctanx=xx33+x55+

About x=a:

  f(x)=f(a)+f(a)(xa)+f

Let h = x - a:

  \begin{aligned} f(a + h) = f(a) + f'(a) h + f''(a) \frac{h^2}{2!} + f'''(a) \frac{h^3}{3!} + \cdots \end{aligned}

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