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Apply the product rule for differentiation: $(f\cdot g)'=f'\cdot g+f\cdot g'$, where $f=
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$\frac{d}{dl}\left(l\right)\left(6t^3-8t^2+4t-1\right)+l\frac{d}{dl}\left(6t^3-8t^2+4t-1\right)$
Learn how to solve problems step by step online. Find the derivative of l(6t^3-8t^24t+-1). Apply the product rule for differentiation: (f\cdot g)'=f'\cdot g+f\cdot g', where f=. The derivative of the linear function is equal to 1. 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 (-1) is equal to zero.