1003032506

SubArea: 
Polynomials and fractions
Level: 
C
Project ID: 
1003032506
Source Problem: 
2010000805
Accepted: 
1
Clonable: 
1
Easy: 
0
In a parallel circuit the total resistance \( R \) of three components with the resistances \( R_1 \), \( R_2 \), \( R_3 \) is given by the formula \( \frac1R=\frac1{R_1}+\frac1{R_2}+\frac1{R_3} \). Express \( R_1 \) from this formula.
\( R_1=\frac{RR_2R_3}{R_2R_3-R(R_2+R_3)} \)
\( R_1=\frac{R-R_2-R_3}{RR_2R_3} \)
\( R_1=R-\frac{R_2R_3}{R_2+R_3} \)
\( R_1=\frac{R_2R_3-R(R_2+R_3)}{RR_2R_3} \)