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if f:R->[pi/6,pi/2),f(x)= arcsin (x^2 - a/x^2 + 1) is a onto function,den set of values of "a" is.....

3 years ago


Answers : (1)

y = sin^{-1}(x^{2}-\frac{a}{x^{2}}+1)
This is simple Quadratic in x2,
\Delta \geq 0
(1-siny)^{2}\geq 4.(-a)
sin^{2}y-2siny+1+4a\geq 0
\Delta <0
Thanks & Regards
Jitender Singh
IIT Delhi
askIITians Faculty
one year ago

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