Question

The equation r=11r1+1r2 represents the total resistance, r, when two resistors whose resistances are r1 and r2 are connected in parallel. Find the total resistance when r1 is x and r2 is x + 1.

Answer 1

r = 12x + 1

Explanation:

r = 11r₁ + r₂

r₁ = x

r₂ = x + 1

r = 11x + (x + 1)

r = 12x + 1