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If range of the function f(x) = tan^(-1)...

If range of the function `f(x) = tan^(-1) ( 3x^(2) + bx + 3) , x in R " is " [0, pi/2)`, then square of sum of all possible values of b will be

A

0

B

18

C

72

D

None of these

Text Solution

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The correct Answer is:
A
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