Solution

ID: past-exam-of-the-mathematics-course-of-the-year-1-of-the-natural-sciences-course-of-the-university-of-cambridge/2011/paper-2/2/solution

The numerator is the derivative of the denominator. Using the chain rule in reverse gives the antiderivative
The absolute value makes this real on every interval where the denominator is nonzero. The integration constant may be chosen independently on the intervals separated by .

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