Consider the circuit shown below and answer following questions.

What will be the effective resistance of the circuit ?

R1R2R3 /(R1+R2+R3)  2R1R2 /(R1+R2+R3)   R1+ R2R3 /(R2+R3)  R1+R3 /(R2+R3)

R1+ R2R3 /(R2+R3)

R1 is in series combination with R2 || R3. $\Rightarrow R_{eq} = R_1 + \frac{R_2 R_3}{R_2+R_3}$