If \[f(x)\,=\,\,\left\{ \begin{matrix} \frac{x-1}{2{{x}^{2}}-7x+5} & \text{for }x\ne 1 \\ -\frac{1}{3} & \text{for }x=1 \\ \end{matrix}\,\,, \right.\] then \[f'(1)=\] [EAMCET 2003]

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1.	If \[f(x)\,=\,\,\left\{ \begin{matrix} \frac{x-1}{2{{x}^{2}}-7x+5} & \text{for }x\ne 1 \\ -\frac{1}{3} & \text{for }x=1 \\ \end{matrix}\,\,, \right.\] then \[f'(1)=\] [EAMCET 2003]
A.	?1/9
B.	?2/9
C.	?1/3
D.	1/3
Answer» C. ?1/3

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If \[f(x)\,=\,\,\left\{ \begin{matrix} \frac{x-1}{2{{x}^{2}}-7x+5} & \text{for }x\ne 1 \\ -\frac{1}{3} & \text{for }x=1 \\ \end{matrix}\,\,, \right.\] then \[f'(1)=\] [EAMCET 2003]

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