¿como se despeja: R2 en 1/R=1/R1+1/R2+1/R3?
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1/R=1/R1+1/R2+1/R3
1/R2 = 1/R – (1/R1+1/R3)
R2 = 1/(1/R -1/R1-1/R3)
O también:
1/R2 = 1/R -1/R1-1/R3 = (R1R3 - RR3 – RR1)/(R R1 R3)
R2 = (R R1 R3)/( R1R3 – RR3 - RR1)