Question

What's the answer to this one?

Answer 1

b^(-6)

Explanation:

The numerator of this fraction is b^(-11). The -11 is the sum of -4 and -7.

The denominator is b^(-5).

Recall that b^a / b^c = b^(a - c). Thus, b^(-11) / b^(-5) = b^(-6)