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The derivative of a sum of two or more functions is the sum of the derivatives of each function
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$\frac{d}{db}\left(4ab^2\right)+\frac{d}{db}\left(-4abn\right)+\frac{d}{db}\left(an^2\right)$
Learn how to solve problems step by step online. Factor the expression 4ab^2-4abnan^2. The derivative of a sum of two or more functions is the sum of the derivatives of each function. Apply the product rule for differentiation: (f\cdot g)'=f'\cdot g+f\cdot g'. Apply the product rule for differentiation: (f\cdot g)'=f'\cdot g+f\cdot g', where f=. The derivative of the constant function (4) is equal to zero.