Question

4^-2·7^-2 which expressions are equivalent

Answer 1

Recall the following property of exponents:

`a^(-n)=(1)/(a^n)`

Then:

`4^(-2)\cdot7^(-2)=(1)/(4^2)\cdot(1)/(7^2)=(1)/(16)\cdot(1)/(49)=(1)/(784)`