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If y = a log|x| + bx^(2) + x has extreme...

If `y = a log|x| + bx^(2) + x` has extreme values at x = 2 and x = -4/3 then find a and b.

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The correct Answer is:
a = 4, b = `-3/4`
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AAKASH SERIES-MAXIMA & MINIMA-ADDITIONAL EXERCISE
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