函数(z)=dfrac (1)({e)^z-1}是周期函数吗?(填是或否)

z=1是函数f(z)=(tan(z-1))/(z-1)的(）A. 极点;B. 本性奇点;C. 可去奇点;D. 一级零点;

1.求下列函数的留数:-|||-(1) (z)=dfrac ({e)^z-1}({z)^5} 在 z=0 处;-|||-(2) (z)=(e)^dfrac (1

z=0是函数(z)=dfrac (z)(sin {z)^2cdot ((e)^z-1)}的几级极点A 1 B 2 C 3 D 4z=0是函数的

1.将下列各函数在指定圆环内展为洛朗级数.-|||-(1) dfrac (ln (2-z))(z(z-1)) lt |z-1|lt 1;-|||-(2) dfr

设C为正向圆周|z|=2, 则下列积分值不为0的是( )A.int dfrac (z)(z-1)dxB.int dfrac (z)(z-1)dxC.

1:将下列各函数在指定圆环内展为洛朗级数.-|||-(1) dfrac (ln (2-x))(z(x-1)), lt |z-1|lt 1 ;-|||-(2) d

求直线dfrac (x-1)(1)=dfrac (y)(1)=dfrac (z-1)(-1)-|||-__ __在平面dfrac (x-1)(1)=dfrac

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)

直线dfrac (x-1)(1)=dfrac (y-1)(0)=dfrac (z-1)(-1)-|||-__与直线dfrac (x-1)(1)=dfrac (y

[ dfrac {{e)^2}({(z-1))^2},1] =-|||-A e-|||-B dfrac (1)(e)-|||-C dfrac (e)(2)-||