MCQ
જો $2x + y + \lambda = 0$ એ પરવલય $y^2 = -8x,$ ની નાભિ જીવા હોય, તો $\lambda$ નું મૂલ્ય શોધો.
- A$-4$
- ✓$4$
- C$2$
- D$-2$
Given parabola is $y^2=-8 x$
Compering with general form $y^2=-42 x, a=2$
Focta is at $(-2,0)=(-2,0)$
Now given focal chord $2 \pi+y+\lambda=0$ must pasa trrough the focus $(-2,0)$
$=2(-2)+0+\lambda=0$
$\Rightarrow \lambda=4 .$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.