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## Homework Statement

Calculate

Z

_{1}=5+j10

Z

_{2}=10+j8

Z

_{3}=10+J5

R

_{L}=40

V=100

V

_{TH}=VX(Z

_{2}/Z

_{1}+Z

_{2})

Z

_{TH}=Z

_{3}+(Z

_{1}Z

_{2}/Z

_{1}+Z

_{2})

I=V

_{TH}/(Z

_{TH}+R

_{L)}

I

_{L}=?

## Homework Equations

My question is what calculation method is more accurate:

First to convert complex numbers in polar forms, and then calculate or calculate complex number until final result and then convert in polar form?

## The Attempt at a Solution

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