Question

[(1/7)^-3 - (1/5)^-2]+(2/5)^-3
please anewer this​

Answer 1

hey your answer is :-

[(1/7)^-3 - (1/5)^-2]+(2/5)^-3

=> [ ( 1/7×1/7×1/7) - (1/5×1/5)] ^3

=> [1/343 - 1/25]^3

=> (1/7)^1/3 × 3 - (1/5)2×1/3

=> 1/ 7 - 1/5^ 2/3