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If f(x) ={{:((x-1)/(2x ^(2) -7x +5),"whe...

If `f(x) ={{:((x-1)/(2x ^(2) -7x +5),"when"x ne1),(-1/3, "when" x=1):}` then the value of `f '(1)` is-

A

`1/9`

B

`-1/9`

C

`-2/9`

D

`2/9`

Text Solution

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The correct Answer is:
C
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