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

वक्र \(y =( x -2)^{2}-1\) के रेखा \(x - y =3\) से प्रतिच्छेदन बिन्दुओं पर वक्र की स्पर्श रेखायें निम्न में से किस बिन्दु पर मिलती हैं

  1. A \(\left( {\frac{5}{3},1} \right)\)
  2. B \(\left( {-\frac{5}{2},-1} \right)\)
  3. C \(\left( {-\frac{5}{2},1} \right)\)
  4. D \(\left( {\frac{5}{2},-1} \right)\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\left( {\frac{5}{2},-1} \right)\)

Step-by-step Solution

Detailed explanation

\(x - y - 3 = 0\,\,\,\,\,\,\,\,\,\,......\left( i \right)\) will be chord of contact of parabola Let the required point is \(P\left( {{x_1},{y_1}} \right)\) chord of contact for point \(P\) is \(\frac{{y + {y_1}}}{2} = x{x_1} - 4\frac{{\left( {x + {x_1}} \right)}}{2} + 3\)…
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