Question

7. By what number should 3^-2 be multiplied so that the product may be equal to -5^-1​

Answer 1

Answer:

let unknown number be x

3^-2 × x = 5^-1

law-

a^-m = 1/a^m

3^-2 = 1/3²

3² = 9

= 1/9

5^-1 = 1/5

1/9×x = 1/5

x/9 = 1/5

by cross multiplication

5x = 9

x = 9/5