Question 94590
The combine resistanc of two resistors R1 and R2 in a parellel circuit is given by the formula
Rt = 1/ 1/R1 + 1/R2
Simplify the formula
:
Rt = {{{1/(1/R1 + 1/R2)}}} = {{{1/((R2+ R1)/(R1*R2)))}}} = 1 * {{{(R1*R2)/(R2 + R1)}}}; or just: {{{(R1*R2)/(R2 + R1)}}}
:
The steps:
1. Put the denominator fraction over a single denominator
2. Invert the dividing fraction and multiply