Evaluate the following integral:
And also,
We know that if f(x) is an odd function,
As we know the property,
Applying this property we get,
Let x2 + x + 1 = t
(2 x + 1) dx = dt
And for limits,
At x = 0, t = 1
At x = 2, t = 7
Therefore, we get,
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