WBJEE · Maths · Parabola
Number of common tangents of \(y=x^{2}\) and \(y=-x^{2}+4 x-4\) is
- A 1
- B 2
- C 3
- D 4
Answer & Solution
Correct Answer
(B) 2
Step-by-step Solution
Detailed explanation
We have, equation of parabola \(y=x^{2}\) Let \(P\left(\alpha, \alpha^{2}\right)\) is a point on the parabola, \(\therefore\) \(y-\alpha^{2}=2 \alpha(x-\alpha)\) \(\because\)…
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