Home
>
A2C
>
Chapter 13
>
Lesson 13.1.4
> Problem 13-88
13-88.
Hint (a):
Use the binomial theorem.
Answer (a):
9
C
5
·
a
5
·
b
9−5
= 126
a
5
b
4
Hint (b):
See part (a).
