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If y=(a x-b)/((x-1)(x-4)) has a turning ...

If `y=(a x-b)/((x-1)(x-4))` has a turning point `P(2,-1),` find the value of `aa n db` and show that `y` is maximum at `Pdot`

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A DAS GUPTA-Maxima and Minima-EXERCISE
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  3. If y=(a x-b)/((x-1)(x-4)) has a turning point P(2,-1), find the value ...

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