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Finding Resistance and Voltage in a Simple Circuit

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In the circuit of Figure 2.17 (see attached file), if v1=v/4 and the power delivered by the source is 40 mW, find R, v, v1, and i. Given: R1=kilo-ohms, R2=10 kilo-ohms, and R3=12 kilo-ohms. Please show your steps. Thanks.

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Solution displays only the calculations necessary to find a resistance value and two voltage values required using information from the circuit diagram given.

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