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The curve described parametrically by x=...

The curve described parametrically by `x=t^2+t+1` , and `y=t^2-t+1` represents. a pair of straight lines (b) an ellipse a parabola (d) a hyperbola

A

a circle

B

a parabola

C

an ellipse

D

a hyperbola

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The correct Answer is:
B
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