[分析] 殘值的問題
大家好
最近寫到一題殘值的問題
題目是這樣的
f(z)= (1+z)/[2(1-cos(z))] at z=0
而題目解答是直接展成勞倫斯級數
再把1/z的係數就是答案 1
可是為什麼代公式
lim(z=a)*[1/(n-1)!]*d^(n-1)/dz^(n-1) *{(z-a)^n *f(z)}
會算不出來呢??
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