单项选择题

幂级数在(-2,2)内收敛于S(x),那么幂级数在(-2,2)内收敛于(    ).
   (A)x·S'(x)    (B)(x·S(x))'    (C)    (D)

A.174.24.96:6088/Latex/latex.action?latex=XHN1bSBfe249MX1ee1xpbmZ0eSB9XGZyYWN7eF5ufXsyXm4rMX0%3D'
B.174.24.96:6088/Latex/latex.action?latex=XHN1bSBfe249MX1ee1xpbmZ0eSB9XGZyYWN7KG4rMSl4Xm59ezJebisxfQ%3D%3D'
C.

D.174.24.96:6088/Latex/latex.action?latex=eFxpbnQgXzBeeFModClkdA%3D%3D'
E.174.24.96:6088/Latex/latex.action?latex=XGludCBfMF54dFModClkdA%3D%3D'
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