Question

Common tangent of curve $y^2$ = 4 2x and $x^2$ + $y^2$ = 1 is ax + y = c then |c| is -

• A. $\sqrt{3}$
• B. $\sqrt{5}$
• C. $\sqrt{2}$
• D. $\sqrt{7}$

Answer 1

Answer: (C)

Correct answer is (c) $\sqrt{2}$