Question

The normal to the curve x² = 4y passing (1, 2) is
(A) x + y = 3 (B) x − y = 3
(C) x + y = 1 (D) x − y = 1

Answer 1

The equation of the given curve is x² = 4y.
Differentiating with respect to x, we have:

The slope of the normal to the given curve at point (h, k) is given by, 

From equation (i), we have:

Hence, the equation of the normal is given as:

The correct answer is A.