Question

Simplify the expression:

1. 64 * 63!
option:
A. 65!
B. 64!
C. 66!
D. 63!​

Answer 1

`64 * 63fctorial \\ = 64 * (1 * 2 * .......63) \\ = 1 * 2 * .......63 * 64 \\ = 64factorial \\ thank \: you`

Answer 2

64!

Explanation:

n * (n-1)! = n!

64 * 63! = 64 * (64-1)! = 64!