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Exercise

$\frac{d^3}{dx^3}\left(e^x\cdot\cos\left(2.x\right)\right)$

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Final answer to the exercise

$-11e^x\cos\left(2x\right)+2e^x\sin\left(2x\right)$

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  • Find the derivative using the definition
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  • Integrate by partial fractions
  • Product of Binomials with Common Term
  • FOIL Method
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