Definite Integration Question 166

Question: The area between the parabola $ y=x^{2} $ and the line $ y=x $ is

[UPSEAT 2004]

Options:

A) $ \frac{1}{6} $ sq. unit

B) $ \frac{1}{3} $ sq. unit

C) $ \frac{1}{2} $ sq. unit

D) None of these

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Answer:

Correct Answer: A

Solution:

Given curves are $ y=x^{2} $ and $ y=x $

On solving, we get $ x=0 $ , $ x=1 $ Therefore, required area $ A=\int_0^{1}{(x^{2}-x)}dx $

$ =[ \frac{x^{3}}{3}-\frac{x^{2}}{2} ]_0^{1} $

$ =\frac{1}{3}-\frac{1}{2}=\frac{1}{6} $ sq. unit.