Prove that $\frac{a+b+c}{a^{-1}{b}^{-1}+b^{-1}{c}^{-1}+c^{-1}{a}^{-1}}=abc$.

Important Questions on Indices [Exponents]

HARD

9th ICSE

IMPORTANT

Concise Mathematics I.C.S.E - Class IX>Chapter 7 - Indices [Exponents]>EXERCISE>Q 16

Evaluate $\frac{4}{(216{)}^{-\frac{2}{3}}}+\frac{1}{(256{)}^{-\frac{3}{4}}}+\frac{2}{(243{)}^{-\frac{1}{5}}}$.