Question

Pleaseee number 3 I don’t get it

Answer 1

Hello!

Using the property of exponents, when exponents are multiplied together, the powers are added together.

Here is basic format:
`x^(a) * x^(b) = x^(a + b)`.

With that, add each exponent power together and simplify.

A).
`7^(-1) * 7^(-1) = 7^(-2) = (1)/(49)`

B).
`7^(8) * 7^(-6) = 7^(2) = 49`

C).
`7^(-5) * 7^(3) = 7^(-2) = (1)/(49)`

D).
`7^(7) * 7^(-9) = 7^(-2) = (1)/(49)`

E).
`7^(-2) * 7^(4) = 7^(2) = 49`

Therefore, the expressions equivalent to 1/49 are A, C, and D.