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[" Let "f(x)" is a quadmtic expression s...

[" Let "f(x)" is a quadmtic expression such that "f(-2)=f(2)=0" and "f(1)=6" .If "],[lim_(x rarr0)(sqrt(f(x))-2sqrt(2))/(ln cos x)=ell" then "4ell^(2)=...]

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