- #1

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## Homework Statement

## Homework Equations

V=IR

## The Attempt at a Solution

I believe my a1 and a2 are correct.

But my b1 is definitely wrong. Even if I carry out the above subtraction for the v1 part (which gives you b1) I will not have somethign as simple as R2 + R3 on the numerator

[/B]

Where would be some starting places to pinpoint the error?