1.

Prove that: (a^-1 + b^-1)^-1 =ab÷a+b​

Answer»

Step-by-step EXPLANATION:

To PROVE: (a^-1 + b^-1)^-1 = ab/a+b

LHS = (a^-1 + b^-1)^-1

(1/a + 1/b)^-1

(a+b/ab)^-1

ab/a+b



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