Question

How do you simplify `t^-4` using only positive exponents?

Answer 1

`t^(-4) = 1/(t^4)`

Explanation:

If `n` is a positive integer, then:

`t^n = overbrace(t xx t xx ... xx t)^"n times"`

If `t != 0` then:

`t^(-n) = 1/underbrace(t xx t xx ... xx t)_"n times" = 1/(t^n)`