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Two of the straight lines given 3x^3+3x^...

Two of the straight lines given `3x^3+3x^2y-3xy^2+dy^3=0` are at right angles, if

A

`d=-1//3`

B

`d=1//3`

C

d=-3

D

d=3

Text Solution

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The correct Answer is:
C
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