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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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$\frac{d}{dn}\left(6m\right)+\frac{d}{dn}\left(-9n\right)+\frac{d}{dn}\left(21nx\right)+\frac{d}{dn}\left(-14mx\right)$
Learn how to solve differential calculus problems step by step online. Find the derivative of 6m-9n21nx-14mx. The derivative of a sum of two or more functions is the sum of the derivatives of each function. The derivative of the linear function times a constant, is equal to the constant. The derivative of the linear function times a constant, is equal to the constant. The derivative of the linear function is equal to 1.