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$\frac{d}{db}\left(ab-s\right)$
Learn how to solve differential calculus problems step by step online. Find the derivative of 1ab-s. Simplifying. The derivative of a sum of two or more functions is the sum of the derivatives of each function. The derivative of the constant function (-s) is equal to zero. Apply the product rule for differentiation: (f\cdot g)'=f'\cdot g+f\cdot g', where f=.