The parabola y² = 4ax passes through (2, 4), then the value of a is
Q1. The parabola y² = 4ax passes through (2, 4), then the value of a is
Answer: 1 / 2
Explanation: Substitute the point (2, 4) into the equation y² = 4ax to get 16 = 8a, so a = 2 / 2 = 1 / 2 * 2 = 2 / 2.