Question

I attached the picture of the problem please help I am so confused and would really appreciate it

Answer 1

(a^4)^5

Explanation:

To express a^20 in the form (a^n)^m

We apply the law of indices :

From the power rule :

(a^n)^m = a^n*m

Hence,

For :

a^20 ; expressing 20 in the form n*m

20 = 4*5

Hence,

a^20 = (a^4)^5