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Find the area of the region enclosed by the curve y = 1/(1+x2) and it’s asymptote.

Find the area of the region enclosed by the curve y = 1/(1+x2) and it’s asymptote.

Grade:12

1 Answers

Rinkoo Gupta
askIITians Faculty 81 Points
9 years ago
Intersection point of the curve with the axis can be obtained by puting x=0=> y=1 i.e. (0,1)
eq of curve can be written as y+yx^2=1
Asymptotes parralel to the axis is given by equating to zero the coeff. of highest power of x
i.e. y=0
Required area is 2integral(lim x=0 to infinity) y dx
=2integral [1/(1+x^2)]dx under lim 0 to infinity
=2 [arctan(x)] lim 0 to infinity
=2[arctan(infinity)-arctan(0)]
=2.pi/2
=pi
Thanks & Regards
Rinkoo Gupta
AskIITians Faculty

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