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

વક્ર \(y = (x -2)^2 -1\) પરના સ્પર્શકોનો રેખા \(x -y = 3\) સાથે છેદે છે તો છેદબિંદુ મેળવો. 

  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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