toughie

JEE Main 2015 Questions › Calculus questions › toughie

Let f (x) = (x² -1)^k where k belongs to N. The number of distinct real roots of equation fⁿ(x) = 0 are 'm' (where fⁿ (x) denotes the nth derivative of f (x)). If 'm' equals to 10 for exactly one value of 'n' , then k equals to
1. 8
2. 9
3. 10
4. 11

#Mathematics #Calculus

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Subash ·2009-02-07 06:15:45

it is pretty clearly given as derivative

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Basic Integral Calculus Operators Symbols Matrix Cases

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