Question

Which is the value of this expression when a = 5 and k = negative 2?

1/75 Fraction
9/25 Fraction
25/9 Fraction
75

Answer 1

25/9

Explanation:

hello :

this expression equivalent to : (3/a)^5

because ;3²a^(-2)/3a^(-1)= (3²/3)×(a^(-2)/a^(-1)) = 3a^(-2+1) = 3a^(-1) = 3/a

now : a=5 and k= -2 so : (3/5)^(-2) = (5/3)² =25/9