题目内容
| 设f0(x)=sinx,f1(x)=f0′(x),f2(x)=f1′(x),…,fn+1(x)=fn′(x),n∈N,则f2005(x)= |
A.sinx B.-sinx C.cosx D.-cosx |
试题答案
C
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设f0(x)=sinx,f1(x)=f0′(x),f2(x)=f1′(x),…,fn+1(x)=fn′(x),n∈N,则f2006(x)=( )
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| A.cosx | B.-cosx | C.sinx | D.-sinx |