( 12 cos x-1 X If the function e' d...
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( 12 cos x-1 X If the function e' defined on ( ) by f(x)= cot x-1 cotx-1 '*is continuous, th Ik ,x=- (1) TE (2)2 (3 (4) 1 Let f(x) = 15-x-10;X E R. Then the set of all values of x, at which the function, g(x)=f(f(x)i not differentiable, is (1) {10} (2) {10,15} {5,10,15; (4) {5, 10, 15, 203

JEE/Engineering Exams
Maths
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( x ) ( F(x)=left{begin{array}{c}frac{sqrt{2} cos x-1}{cot x-1} cdot x eq frac{pi}{4} k & , x=frac{pi}{4}end{array}right. ) ( Fleft(frac{pi}{4}right): Fleft(frac{pi}{4}+(2)=frac{1}{4-20} frac{sqrt{2} cos h-1}{cot h-1}right. ) o fom l'Hospital nulems ( =u_{100}+frac{sqrt{2} sin h-0}{t operatorname{cosen}^{2} h-0} ) ( =4 ) ( h rightarrow 0 ) ( =0=f(v)=[k=0 )
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