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JEE Mains · Maths · STD 11 - 10.2 parabola,ellipse,hyperbola

माना परवलय \( x^{2}=4y \) का रेखा \( x-y=1 \) में प्रतिबिंब \( (y+\alpha)^{2}=b(x-c) \) है, जहाँ \( a, b, c \in \mathbb{N} \)। तब \( a+b+c \) का मान ___ है।

  1. A 12
  2. B 4
  3. C 6
  4. D 8
Verified Solution

Answer & Solution

Correct Answer

(C) 6

Step-by-step Solution

Detailed explanation

Parametric point P on \( x^2=4y \) is \( P(2t, t^2) \). ∴ mirror image of P in \(x - y =1\) is \(Q \equiv\left(2 t-\frac{2 \cdot 1 \cdot\left(2 t-t^2-1\right)}{2}, t^2+\frac{2 \cdot 2(1) \cdot\left(2 t-t^2-1\right)}{2}\right)\)…
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