Question

evaluate (5/7^-3) *(7/5^-5)​

Answer 1

Step-by-step explanation:

a^(m+n) = a^m x a^n

(5/7)^-3 × (7/5)^-3 × (7/5)^-2

a^m × b^m = (a×b)^m

(5/7×7/5)^-3 ×(7/5)^-2

(a/b)^-m = (b/a)^m

1^-3 × (5/7)² = 5²/7² = 25/49