Area under the curveMedium
Question
The area bounded by the curve y = f(x), x-axis and the ordinates x = 1 and x = b is (b − 1) sin (3b + 4) , then f(x) equals-
Options
A.(x − 1) cos ( 3x + 4)
B.sin (3x + 4)
C.sin (3x + 4) + 3 (x – 1) cos (3x + 4)
D.None of these
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