Parabola: tangent at point (x₁, y₁) (Tangent to y² = 4ax at point on curve replaces one y² and one x linearly)
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Tangent to y² = 4ax at point on curve replaces one y² and one x linearly
What each symbol means
| Symbol | What it stands for |
|---|---|
| a | Parameter |
| x_1,y_1 | Point on parabola |
When to use this
Point lies on y² = 4ax.