How do you write

Question

-1/9 x^-1 with a positive exponent?

also, -5 x^-2 ??

Answer 1

-(1/9)*x^-1.
Move x^-1 to the denominator using the opposite sign(+) This is equivalent to
multiplying the numerator and denominator by x^+1.

-1 / 9x.

-5x^-2.
Using the same procedure as in prob.1,
we get:
-5 / x^2.