About Lesson
7.2 General Term Formula for Binomial Expansion 二项展开式的通项公式
1. Find the coefficient of in the expansion of .
求 在 的展开式中的系数
Answer:
[2]
Find the constant term in the expansion of .
求在的展开式中的常数项
Answer:
2160
[3]
Find the term independent of x in the binomial expansion of .
求 在 二项式展开式中不含 x 的项.
Answer:
[4]
In the binomial expansion of the sum of the second and third terms is zero.
Calculate the value of n and hence evaluate the fourth term, where n N.
在的二项展开式中第二和第三项之和为0. 试计算n之值並求第四项, 其n N。
Answer:
21, -1.33
[5]
Prove that + + + … + = 2n – 1 for n is an even number.
试证 + + + … + = 2n – 1, 其中n为偶数