JEE Advanced Mathematics question
The equation of the circle of radius whose centre lies on the line and which touches the line , and whose centre's coordinates satisfy the inequality is
Answer: (A)
Solution
The centre is . The distance from equals the radius:
= 22 \ ⇒\ |2t - 4| = 4 \ ⇒\ t = 4 or t = 0.
The co
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