Question

The line y = mx + 1 is a tangent to the curve y² = 4x if the value of m is

(A) 1

(B) 2

(C) 3

(D) 1/2

Answer 1

The equation of the tangent to the given curve is y = mx + 1.

Now, substituting y = mx + 1 in y² = 4x, we get:

Hence, the required value of m is 1.

The correct answer is A.