Simplify using exponent rules 7^4*7*7^13*7^-21
To simplify the expression 7^4 * 7 * 7^13 * 7^-21 using exponent rules, we can add the exponents of any factors with the same base.
First, let's simplify the powers of 7:
7^4 * 7 * 7^13 * 7^-21 = 7^(4 + 1 + 13 - 21).
Now, we can add the exponents:
7^(4 + 1 + 13 - 21) = 7^(-3).
This gives us the simplified expression of 7^-3.
Choose from these
28^-2
1/7^2
1/7^3
1/7^-2