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Q : 16        Area bounded by the curve \small y=x^3, the \small x-axis and the ordinates \small x=-2 and \small x=1  is

                  (A)  \small -9            (B) \small \frac{-15}{4}            (C) \small \frac{15}{4}            (D) \small \frac{17}{4}

Answers (1)

best_answer

Hence the required area

 =\int_{-2}^1 ydx

=\int_{-2}^1 x^3dx = \left [ \frac{x^4}{4} \right ]_{-2}^1

= \left [ \frac{x^4}{4} \right ]^0_{-2} + \left [ \frac{x^4}{4} \right ]^1_{0}

= \left [ 0-\frac{(-2)^4}{4} \right ] + \left [ \frac{1}{4} - 0 \right ]

= -4+\frac{1}{4} = \frac{-15}{4}

Therefore the correct answer is B.

Posted by

Divya Prakash Singh

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