thevenin equation

Am I solving this problem correctly
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I have carefully reworked the first part of the question up to the bit ythat reads "Now we need to determine short current...."

I'll report when I have confirmed the algebra in the second part.

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At a glance, it looks like you're using valid calculations for the problem.  But I think the question implies that you should be using Norton and Thevenin transformations to get the answer.  Use the transformations to calculate i_b on the left side, then find your Thevenin parameters in terms of i_b, then substitute i_b back into your answers.

Does your professor/TA permit using notation like R1||R2 ?  I think that would greatly simplify your equations.
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Math / Science

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