If you would like to find the equivalent expression to 1/49, you can do this using the following steps:
1/49 = 1/(7^2) = 7^(-2) = 7^(-5) * 7^3 = 7^(-5+3) = 7^(-2) = 7^7 * 7^(-9) = 7^(7-9) = 7^(-2)
The correct result would be: c. 7^-5*7^3 and d. 7^7*7^-9.
