tim Vf(x) -3 If f(9)=9 and f'(9)= 4...
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tim Vf(x) -3 If f(9)=9 and f'(9)= 4, then x9 VX-3 equal to :(f(x) is differentiable XER) is . A 0 D None of these

JEE/Engineering Exams
Maths
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( lim _{n rightarrow 9} frac{sqrt{f(n)}-3}{5 x-3} ) ( frac{0}{0} ) form, ( Rightarrow ) we L-Hopilel srue ( lim _{x rightarrow 9} frac{1}{2 sqrt{f(x)}} f^{prime}(x)=sqrt{x} ) ( Rightarrow quad frac{-1}{n rightarrow 9} frac{f^{prime}(x) cdot sqrt{x}}{sqrt{f(x)}} ) ( =frac{883}{3}=frac{4 times 3}{3}=4 )
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