
展開式中的常數(shù)項有

的通項為

其中

的通項為

,所以通項為

,令

得

,當(dāng)

時,

,得常數(shù)為

;當(dāng)

時,

,得常數(shù)為

;
當(dāng)

時,

,得常數(shù)為

;

練習(xí)冊系列答案
相關(guān)習(xí)題
科目:高中數(shù)學(xué)
來源:不詳
題型:單選題
設(shè)
a、
b、
m為整數(shù)(
m>0),若
a和
b被
m除得的余數(shù)相同,則稱
a和
b對模
m同余.記為
a≡
b(mod
m).已知
a=1+C

+C

·2+C

·2
2+…+C

·2
19,
b≡
a(mod 10),則
b的值可以是
查看答案和解析>>
科目:高中數(shù)學(xué)
來源:不詳
題型:解答題
(12分)已知

.
求證:當(dāng)

為偶數(shù)時,

能被

整除.
查看答案和解析>>
科目:高中數(shù)學(xué)
來源:不詳
題型:解答題
(1)已知f(x)=(x-5)
7+(x-8)
5=a
0+a
1(x-6)+a
2(x-6)
2+…+a
7(x-6)
7,求a
0+a
1+a
2+a
3+a
4+a
5+a
6+a
7的值.
(2)在二項式
(+)^的展開式中,各項系數(shù)和為A,各二項式系數(shù)和為B,且A+B=72,求含
(-)^2n式中含
x的項.
查看答案和解析>>
科目:高中數(shù)學(xué)
來源:不詳
題型:解答題

的展開式奇數(shù)項的二項式系數(shù)之和為

,則求展開式中二項式系數(shù)最大項。
查看答案和解析>>
科目:高中數(shù)學(xué)
來源:不詳
題型:單選題
已知等差數(shù)列

的通項公式為

,則

的展開式中含

項的系數(shù)是該數(shù)列的( ▲ )
查看答案和解析>>
科目:高中數(shù)學(xué)
來源:不詳
題型:填空題

的展開式中

的系數(shù)為__________________.
查看答案和解析>>
科目:高中數(shù)學(xué)
來源:不詳
題型:解答題
已知

的展開式中,

的系數(shù)是

的系數(shù)與

的系數(shù)的等差中項,求

;
查看答案和解析>>
科目:高中數(shù)學(xué)
來源:不詳
題型:填空題
若

的展開式中

的系數(shù)為

,則常數(shù)

的值為
.
查看答案和解析>>