Thevenin equivalent circuit problem

[leopard]

I start with the Thevenin equivalent.

$$\hat{R} = R_2 + R_4 || R_1 = 6 \Omega$$
$$R_{Th} = R_3 + \hat{R} || R_5 = 8 \Omega$$

The correct answer here should be $$2 \Omega$$

 

[turin]

From what I remember of this stuff, I agree with your answer of 8ohm. At any rate, surely it cannot be any less than R3, can it? Are you sure you are comparing to the appropriate answer?

 

[noumed]

8ohms look right to me as well.