[单选题](z)=(z)^2+dfrac (1)({z)^2-1}f'(z)=( )

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5.(单选题)f(z)=(1)/(z(z-1)^2)在0A. $(A)\sum_{n=0}^{\infty}(-1)^{n}z^{n}$B. $(B)\frac

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2.[单选题] lim _(xarrow 1)dfrac ({z)^2+z-2}(z-1)=-|||-()()-|||-bigcirc A.1-|||-big

[题目]如果复数z1,z2,z3满足等式 dfrac (({z)_(2)-(z)_(1))}(({z)_(3)-(z)_(1))}=dfrac (({z)_(1

求下列函数的奇点:(1)dfrac (z+1)(z({z)^2+1)}; (2)dfrac (z+1)(z({z)^2+1)}求下列函数的奇点:(1)

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11.求Res[f(z),infty]的值，如果1)f(z)=(e^z)/(z^2)-1;2)f(z)=(1)/(z(z+1)^4)(z-4).11.求Res$

计算(int )_(c)_(c)dfrac (cos z)((z-dfrac {1)(2))(z-1)}dz，其中(int )_(c)_(c)dfrac (co