If y=\frac{1}{\frac{1}{a}+\frac{1}{b}}, when a=1 and b=1/3, then y=?

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If y=\frac{1}{\frac{1}{a}+\frac{1}{b}}, when a=1 and b=1/3, then y=?

E

Editor

Sep 18, 2022

If y=\frac{1}{\frac{1}{a}+\frac{1}{b}}, when a=1 and b=1/3, then y=?

Difficulty: Easy

A:

1/3

B:

1

C:

3

D:

1/4

ID: 63273db5ca83163ac3a0a103