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प्रश्न
Write necessary condition for a point x = c to be an extreme point of the function f(x).
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उत्तर
We know that at the extreme points of a function f(x), the first order derivative of the function is equal to zero, i.e.
`f'(x) = 0 " at " x = c`
`⇒ f'(c) = 0`
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