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The least value of the function F(x) =

x2log1/3tdt,x[1/10,4] is at x =

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a
1/10
b
4
c
1
d
none of these

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detailed solution

Correct option is C

F′(x)=−log1/3⁡x=log⁡xlog⁡3. So F′(x)<0 for 1100 for x > 1. Hence f has least value at x = 1.


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