The area bounded by the curves y = f ( x ), the x -axis and the ordinates x = 1, x = b is…
Mathematics · JEE Advanced · NTA Exams — Integral Calculus
The area bounded by the curves y = f (x), the x-axis and the ordinates x = 1, x = b is (b – 1) sin (3b + 4). Then f (x) is
- (x – 1) cos (3x + 4)
- sin (3x + 4)
- sin (3x + 4) + 3 (x – 1) cos (3x + 4)
- none of these.
Answer
(C) sin (3 x + 4) + 3 ( x – 1) cos (3 x + 4)
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