Let M be the total mass of a metal rod in the shape of the curve y
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Let M be the total mass of a metal rod in the shape of the curve y = ƒ(x) over [a, b] whose mass density ρ(x) varies as a function of x. Use Riemann sums to justify the formula
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M = √² p(x) √ 1 + f²(x)² dx a
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