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

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Answer 1 · 2016-03-27T12:21:30

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

If $n$ is a positive integer, then:

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

If $t != 0$ then:

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

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