divide and simplify: (d^-9) / (d^-1)?

Question

gracias kind math geniouses

Answer 1

In general when you have x^a / x^b, that is the same as x^(a-b).

So in your example:
(d^-9) / (d^-1) is the same as d^(-9 - (-1))

The answer is:
d^-8

Alternatively this could be written as:
1 / d^8

Answer 2

d^-8 or 1/d^8

Answer 3

(d^-9) / (d^-1)=d^-8

Answer 4

d^-10

In general x^m/x^n = x^(m-n)

Example 2^5/2^2 = 32/4 = 8 (2^3)