3) = 5−27Y" = 6X−4; Y” = 0 ⇔ X = 2

3 ) - DE THI TUYEN SINH DAI HOC MON TOAN KHOI A NAM 2010 CO DAP AN
Toán DE THI TUYEN SINH DAI HOC MON TOAN KHOI A NAM 2010 CO DAP AN

3

) =

5

−

27

y" =

6

x

−

4

; y” = 0 ⇔ x =

2