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Solve the Equation for the Specified Variable f=f1f2f1+f2\mathrm { f } = \frac { \mathrm { f } _ { 1 } \mathrm { f } _ { 2 } } { \mathrm { f } _ { 1 } + \mathrm { f } _ { 2 } } \quad

Question 138

Multiple Choice

Solve the equation for the specified variable.
- f=f1f2f1+f2\mathrm { f } = \frac { \mathrm { f } _ { 1 } \mathrm { f } _ { 2 } } { \mathrm { f } _ { 1 } + \mathrm { f } _ { 2 } } \quad for f2\mathrm { f } _ { 2 }


A) f2=ff1f1ff _ { 2 } = \frac { f - f _ { 1 } } { f _ { 1 } - f }
B) f2=ff1f1ff _ { 2 } = \frac { f f _ { 1 } } { f _ { 1 } - f }
C) f2=ff1f1+ff _ { 2 } = \frac { f f _ { 1 } } { f _ { 1 } + f }
D) f2=1f _ { 2 } = - 1

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