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PART 1: When an electric current passes through two resistors with resistance r and s, connected in parallel, the combined resistance, R, can be calculated

PART 1:

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When an electric current passes through two resistors with resistance r and s, connected in parallel, the combined resistance, R, can be calculated from the equation R where R, r and s are positive. Assume that s is constant. Then, (1) in terms of r and s, dR (2) Is R an increasing or decreasing function of r? If we consider the interval a

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