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For f(x)=4x^(3)+3x^(2)-x-1, the range of...

For `f(x)=4x^(3)+3x^(2)-x-1,` the range of vaues of `(f(x_(1))-f(x_(2)))/(x_(1)-x_(2))is`

A

`(-oo,-(5)/(4))`

B

`(-oo,-(7)/(4))`

C

`[-(7)/(4),oo)`

D

`[-(5)/(4),oo)`

Text Solution

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The correct Answer is:
C
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