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The curve y=ax^3 + bx^2 + cx + d has a p...

The curve `y=ax^3 + bx^2 + cx + d` has a point of inflexion at x=1 , then :

A

`a + b 0`

B

`a + 3b =0`

C

`3a + b = 0`

D

`3a - b =0`

Text Solution

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The correct Answer is:
C
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