JEE Main & Advanced
JEE Main Paper (Held On 09-Jan-2019 Morning)
question_answer
Axis of a parabola lies along x-axis. If its vertex and focus are at distance 2 and 4 respectively from the origin, on the positive x-axis then which of the following points does not lie on it?
[JEE Main Online Paper (Held On 09-Jan-2019 Morning]
A)\[\left( 8,\text{ }6 \right)\]
B)\[\left( 4,\,-4 \right)\]
C)\[(6,\,\,4\sqrt{2})\]
D)\[(5,\,\,2\sqrt{6})\]
Correct Answer:
A
Solution :
Equation of parabola is \[{{\left( y-0 \right)}^{2}}=4a\left( x-2 \right)\] \[{{y}^{2}}=4.2\,(x-2)\] \[{{y}^{2}}=8(x-2)\] check option (1) is correct