7 to the power of - 2

Question

_______________________

7 to the power of - 4

could you show me how you get 49 as the naswer...the long line shows that you need to divide both of them

Answer 1

If you see a negative exponent in the numerator, it is the reciprocal of the number without the negative sign in the exponent. Namely:

A^-b = 1/A^b
or
1/A^-b = A^b

Therefore
7^-2 / 7^-4
=7⁴ / 7²
=?