Applications of Integration - Area bounded by 2 curves

Applications of Integration - Area bounded by 2 curves

IB Year 6 | Grade 12

Find the area of the region bounded by

  1. \(\mathrm{f}(x) = e^x - e^{-x}\) the \(x\)-axis, the line \(x = -1\) and the line \(x = 1\).
  2. \(\mathrm{f}(x) = \frac{1}{x-1} + 1\), the \(x\)-axis, the line \(x = -1\) and the line \(x = 0.5\).
  3. \(y = \cos 2x + 1\), the \(x\)-axis, the line \(x = 0\) and the line \(x = \frac{\pi}{2}\).
  4. \(y = x(x+1)(x-2)\) and the \(x\)-axis.
  5. \(y = |2x - 1|\), the \(x\)-axis, the line \(x = -1\) and the line \(x = 2\).
  6. \(y = |2x| - 1\), the \(x\)-axis, the line \(x = -1\) and the line \(x = 2\).

Solution:

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Answer:(i) \(2(\mathrm e+\mathrm e^{-1}-2)\). (ii) \(\frac{1}{2}\). (iii) \(\frac{\pi}{2}\). (iv) \(\frac{37}{12}\). (v) \(\frac{9}{2}\). (vi) \(3\).

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