Question

Which expression is equivalent to x^-4?
x^-4 • x^1
x^-2 + x^-2
(1/x)^4
x^2 – x^6

Answer 1

Well do you know what the rule is for negative exponents?

Answer 2

So what would x^-4 be?

Answer 3

(1/x)^4=1^4/x^4=1/x^4=x^(-4)

Answer 4

x^-4 = 1/x^4
so the 3rd is OK