WBJEE · Maths · Ellipse
The equation of the tangent to the conic \(x^2-y^2-8 x+2 y+11=0\) at \((2,1)\) is
- A \(x+2=0\)
- B \(2 x+1=0\)
- C \(x+y+1=0\)
- D \(x-2=0\)
Answer & Solution
Correct Answer
(D) \(x-2=0\)
Step-by-step Solution
Detailed explanation
Hints : Equation of tangent at \(\left(x_1, y_1\right)\) is \[ \begin{aligned} & x x_1-y y_1-4\left(x+x_1\right)+\left(y+y_1\right)+11=0 \\ & x_1=2 ; y=1 \end{aligned} \] \(\therefore\) Equation of tangent is…
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