Secant → Tangent Lab
Shrink h toward 0 and watch the secant line squeeze into the tangent — the limit definition made visible.
1 Secant → Tangent Lab
Shrink h toward 0 and watch the secant line squeeze into the tangent — the limit definition made visible.
Controls
Shrink h toward 0: the secant slope squeezes into the tangent slope f′(x₀).
2 Keep going
Read the lesson, drill practice, or use the calculator.