Question

Find positive index (power)

Answer 1

Hii the answer is in the
above image.
Hope it helps.
I have solved it at my level(class 8th).

Answer 2

2^4a × 2^3a × 2^ - 8

= 2^4a + 3a × 2^ - 8

= 2^7a × 2^- 8

= 2^7a × 1/2^8

= 2^7a/2^8