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A (0,a) ,B(0,b) be fixed points , P(x,0)...

A (0,a) ,B(0,b) be fixed points , P(x,0) a variable point. The angle `angle APB` is maximum if

A

`x^2=ab`

B

x=ba

C

`2x^2=2ab`

D

none

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A
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DIPTI PUBLICATION ( AP EAMET)-APPLICATIONS OF DIFFERENTIATION-EXERCISE 1E (MAXIMA AND MINIMA)
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