f'(z)=(z+1)'(2-z)+(z+1)(2-z)'如何计算
问题描述:
f'(z)=(z+1)'(2-z)+(z+1)(2-z)'如何计算
答
(z+1)'
=z'+1'
=1+0
=1
(2-z)'
=2'-z'
=0-1
=-1
所以,
f'(z)=(z+1)'(2-z)+(z+1)(2-z)'
=(2-z)-(z+1)
=-2z+1