Question

Which expression is equivalent to b^-2/ab^-5?a) a/b^5b)1/ab^5c)a^3b/1d)b/a

Answer 1

$\bf a^{-{ n}} \implies \cfrac{1}{a^{ n}}\qquad \qquad \cfrac{1}{a^{-n}}\implies a^{{ n}}\\\\ -------------------------------\\\\ \cfrac{b^{-2}}{ab^{-5}}\implies \cfrac{b^{-2}\cdot b^{+5}}{a}\implies \cfrac{b^{-2+5}}{a}\implies \cfrac{b^3}{a}$