Question

Plzzzzz give me answer of this question. I will mark branliest if your answer is correct with Explaination

Answer 1

Answer:

C is the answer.........

Answer 2

Answer:

$\frac{xy}{x + y}$

Step-by-step explanation:

solution----->

Given

$( { {x}^{ - 1} + {y}^{ - 1} })^{ - 1 } \\ \\ as \: we \: know \: \\ {x}^{ - 1} = \frac{1}{x} \\ \\ same \: rule \: we \:apply\: \:h ere \\ \\ ( { \frac{1}{x} + \frac{1}{y} })^{ - 1} \\ \\ cross \: multiply \: this \\ \\ ( { \frac{x + y}{xy}})^{ - 1} \\ \\ reciprocal \: this \: \\ \\ \frac{xy}{x + y}$