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Questions  

The area bounded by y=1x22x+2 and x -axis. 

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By Expert Faculty of Sri Chaitanya
a
1
b
2
c
3
d
4

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detailed solution

Correct option is A

y=1(x−1)2+1 When x=1,ymax=1  When x→±∞,y→0  Therefore, x -axis is the asymptote.   Also f(1+x)=f(1−x) Hence, the graph is symmetrical about line x=1  From these information the graph of function is as shown in  adjacent figure.  Area =2∫1∞ 1(x−1)2+1dx=2tan−1⁡(x−1)1∞=π sq. units


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