Question

[(3)power -7 divide by (3)power-10]multiply (3) power -5. in a positive exponent ​

Answer 1

Ans :-

Given : 3^-7 ÷ 3^-10 × 3^-5

→ 3^-2

Express with positive exponent,

→ a = -n = $\frac {1}{a^n}$

→ $\frac{1}{3^2}$

→ $\frac{1}{9}$

Ans → $\frac {1}{9}$