Techniques of Differentiation - Product Rule

Techniques of Differentiation - Product Rule

TGM Original Questions

Evaluate each of the following.

  1. \(\frac{\mathrm{d}}{\mathrm{d}x}\left[x^2(2x+2)^3\right]\)
  2. \(\frac{\mathrm{d}}{\mathrm{d}x}\left[(2x+4)(5-x)^4\right]\)
  3. \(\frac{\mathrm{d}}{\mathrm{d}x}\left[(4x-1)(2x+1)^8\right]\)
  4. \(\frac{\mathrm{d}}{\mathrm{d}x}\left[(1+2x^2)^2(3x-1)^3\right]\)

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Answer:(i) \(8x(x+1)^2(5x+2)\) (ii) \(-2(5-x)^3(5x+3)\) (iii) \(12(2x+1)^7(6x-1)\) (iv) \((1+2x^2)(3x-1)^2(42x^2-8x+9)\)

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