将函数f(z)=sinz展开成z的幂级数
人气:439 ℃ 时间:2020-10-01 13:46:25
解答
f(z)=1-2/(z+2)=1-2/[(z-2)+5]=1-0.4*1/[1+(z-2)/5]=1-0.4*Σ【-(z-2)/5】^n( 0到+∞)
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