Question

Ques- Evaluate :
a [(3/7)^3÷(3/7)^8]​

Answer 1

Answer:

(3/7)^3-8

(3/7)^-5

(7/3)^5 Ans.................

Answer 2

Answer:

16807/243 or $7^{5}/ 3^{5}$

Step-by-step explanation:

$[3/7]^{8} - [3/7]^{3}$

3x3x3/7x7x7 ÷ 3x3x3x3x3x3x3x3/7x7x7x7x7x7x7x7

after reciprocal we get ,

3x3x3/7x7x7 x 7x7x7x7x7x7x7x7 / 3x3x3x3x3x3x3x3

on cancelling we get ,  

7x7x7x7x7/3x3x3x3x3 = $7^{5}/ 3^{5}$

which is equal to 16807/243