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Previous Year Question (PYQs)
1
Evaluate the following integral:
$
\int_{-2}^{2} \frac{3x^3 + 2|x| + 1}{x^2 + |x| + 1}\,dx
$
Solution
Note $f(x) = \dfrac{3x^3 + 2|x| + 1}{x^2 + |x| + 1}$
is **odd + even combination**, so integrate separately.
After simplifying using $|x|$ symmetry and limits $[-2,2]$,
only even part contributes.
Result $= 3\log 7$.
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