D = R Y' = 3X2 - 6X = 3X(X - 2), Y' = 0 ⇔ X = 0, X = 2 4 Y" = 6...

1. - DE TUYEN SINH DH NAM 2008 DAP AN MON TOAN KHOI D
Toán DE TUYEN SINH DH NAM 2008 DAP AN MON TOAN KHOI D
1. D = R y' = 3x

2

- 6x = 3x(x - 2), y' = 0 ⇔ x = 0, x = 2

4

y" = 6x - 6, y" = 0 ⇔ x = 1 x - ∞ 0 1 2 +∞

I

2

y' + 0 - - 0 + y" - - 0 + + y 4 2 0 + ∞

1

0

- ∞