gaokao 2020 Q7

gaokao · China · national-III-arts 5 marks Conic sections Equation Determination from Geometric Conditions
Let $O$ be the origin of coordinates. The line $x = 2$ intersects the parabola $C : y ^ { 2 } = 2 p x ( p > 0 )$ at points $D , E$. If $O D \perp O E$, then the focus coordinates of $C$ are
A. $\left( \frac { 1 } { 4 } , 0 \right)$
B. $\left( \frac { 1 } { 2 } , 0 \right)$
C. $( 1,0 )$
D. $( 2,0 )$
Let $O$ be the origin of coordinates. The line $x = 2$ intersects the parabola $C : y ^ { 2 } = 2 p x ( p > 0 )$ at points $D , E$. If $O D \perp O E$, then the focus coordinates of $C$ are\\
A. $\left( \frac { 1 } { 4 } , 0 \right)$\\
B. $\left( \frac { 1 } { 2 } , 0 \right)$\\
C. $( 1,0 )$\\
D. $( 2,0 )$