问题
填空题
(x-
|
答案
Tr+1=(-1)r
x12-r•x-C r12
=r 3
x12-(-1)rC r12
,4r 3
由12-
=0得r=9,4r 3
∴T10=-C123=-220.
故答案为:-220.
(x-
|
Tr+1=(-1)r
x12-r•x-C r12
=r 3
x12-(-1)rC r12
,4r 3
由12-
=0得r=9,4r 3
∴T10=-C123=-220.
故答案为:-220.