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Learn how to solve sum rule of differentiation problems step by step online.
Learn how to solve sum rule of differentiation problems step by step online. Find the derivative (d/dx)(-121*1x^2+4x+3) using the sum rule. 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 (3) is equal to zero. The derivative of the linear function times a constant, is equal to the constant.