Tangent is drawn to y=x^3 at P(t,t^3) , ...

Tangent is drawn to `y=x^3` at `P(t,t^3)` , it intersects curve again at Q.Find ordinate of point which divide PQ internally in 1:2

`-2 t^3`

`0`

`-t^3`

`2t^3`

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