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If y = a log x + bx^2 + x has its extrem...

If `y = a log x + bx^2 + x` has its extreme values at x = -1 and x = 2, then find a and b.

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PRADEEP PUBLICATION-APPLICATIONS OF DERIVATIVES-EXERCISE
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  9. A ballon, which always remains spherical has a variable diameter 3/2 (...

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  14. A solid right circular cylinder has its radius equal to half of its he...

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