Question: An electrical circuit contains three resistors connected in parallel. If the resistance of each is R 1 ,R 2 and R 3 ohms, respectively, their

An electrical circuit contains three resistors connected in parallel. If the resistance of each is R₁ ,R₂ and R₃ohms, respectively, their combined resistance R is given by the formula

R1 R2 R R3

Express R as a rational expression. Evaluate R for R₁ = 5 ohms, R₂ = 4 ohms and R₃ = 10 ohms.

R1 R2 R R3

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