express R as rational expression

1/R=1/R2+1/R2+1/R3

R FOR R1=5 OHMS
R FOR R2=4 OHMS
R FOR R3=10 OHMS

2 answers

correction ..... 1/R=1/R1+1/R2+1/R3
1/R = 1/5 + 1/4 +1/10= 11/20

R/1 = 20/10
R = 2

btw, why did you make a correction, your corrected equation is the same as the original one