Mathematics

Mathematics

Problem

Find ddx[(2x3−5x)cos⁡x]\dfrac{d}{dx}\big[(2x^{3}-5x)\cos x\big]. a) (6x2−5)sin⁡x−(2x3−5x)cos⁡x(6x^{2}-5)\sin x-(2x^{3}-5x)\cos x b) (6x2−5)cos⁡x−(2x3−5x)sin⁡x(6x^{2}-5)\cos x-(2x^{3}-5x)\sin x c) (6x2−5x)cos⁡x−(2x3−5x)sin⁡x(6x^{2}-5x)\cos x-(2x^{3}-5x)\sin x d) (6x2−5)cos⁡x+(2x3−5x)sin⁡x(6x^{2}-5)\cos x+(2x^{3}-5x)\sin x

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