函数的增减区间

GeoGebra 命令及参数

1. Intersect(f', xAxis) → M, N
2. Function(f, -4, 6.5) → g
3. If((a > 0) ∧ (a < 1), X_1, If[(b ≥ 0) ∧ (b < 1) ∧ a ≟ 1, X_2, If[(c ≥ 0) ∧ (c < 1) ∧ b ≟ 1, X_3]]) → X
4. Tangent(C, g) → e
5. UnitVector(e) → u
6. Segment(X, C) → d
7. Segment(C - u, C + u) → h
8. Segment(M, (x(M), g(x(M)))) → k
9. Segment(N, (x(N), g(x(N)))) → l