SOLUTION: please help me answer the following question: (1a.) When three resistors, A1, A2 and A3 are placed in parallel, the equivalent resistance, A, is given by: {{{ 1/A = 1/A1 + 1

Question 1115050: please help me answer the following question:
(1a.) When three resistors, A1, A2 and A3 are placed in parallel, the
equivalent resistance, A, is given by:

rearrange the formula to make the equivalent resistance, A,
the subject of the formula
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
The LCD is . The goal is to get all the fractions to have this denominator so we can combine them. Then we'll apply the reciprocal.

Start with the given equation

Multiply top and bottom of the first fraction by

Multiply and simplify

Multiply top and bottom of the second fraction by

Multiply and simplify

Multiply top and bottom of the third fraction by

Multiply and simplify

Add the numerators over the LCD

Apply the reciprocal to both sides

Simplify
This is the final answer

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