1) Cho ham so f(x) co dao ham cap 2 tren R. Trong cac khang dinh sau day, co bao nhieu khang dinh sai

i) Neu f'(x_o) = 0 va f''(x_o) >0 thi x_o la diem cuc tieu cua ham so

ii) Neu f'(x_o) = 0 va f''(x_o) < 0 thi x_o la diem cuc dai cua ham so

iii) Neu f'(x_o) = 0 va f''(x_o) = 0 thi x_o khong la diem cuc tri cua ham so

iv) Neu f'(x_o) = 0 va f''(x_o) = 0 thi chua ket luan duoc x_o co diem cuc tri cua ham so

A. 0     B. 1       C. 2       D. 3

1) Dong nghia voi tu earn money

A. raise  B. make

1) Cho cac chat: C₂H₅ONa; C₆H₅ONa; NaOH; NaHCO₃; Na₂CO₃. Co bao nhieu chat co the phan ung duoc voi axit fomic

A. 2    B. 3        C. 4       D.5

1) Phat bieu nao sau day khong dung

A. O dieu kien thuong, axit cacboxylic la chat long hoac ran

B. Nhom cacboxyl duoc tao ra boi nhom hidroxyl va cacbonyl

C. Axit cacboxylic khong co kha nang tao lien ket hidro nhu ancol

D. Moi axt cacboxylic co mot vi chua rieng biet

1) Phat bieu nao sau day khong dung

A. O dieu kien thuong, axit cacboxylic la chat long hoac ran

B. Nhom cacboxyl duoc tao ra boi nhom hidroxyl va cacbonyl

C. Axit cacboxylic khong co kha nang tao lien ket hidro nhu ancol

D. Moi axt cacboxylic co mot vi chua rieng biet

1) Cho cac chat: C₂H₅ONa; C₆H₅ONa; NaOH; NaHCO₃; Na₂CO₃. Co bao nhieu chat co the phan ung duoc voi axit fomic

1) cho ham so y = f(x) = x - sinx , x ϵ [0;π] 

y' = 1 - cosx

y' = 0 => \(\left\{{}\begin{matrix}x\in\left[0;\Pi\right]\\cosx=1\end{matrix}\right.=>\left\{{}\begin{matrix}x\in\left[0;\Pi\right]\\x=k2\Pi\end{matrix}\right.=>x=0}\)

tai sao x = 0

1) cho ham so y = f(x) = x - sinx , x ϵ [0;π] 

y' = 1 - cosx

y' = 0 => \(\left\{{}\begin{matrix}x\in\left[0;\Pi\right]\\cosx=1\end{matrix}\right.=>\left\{{}\begin{matrix}x\in\left[0;\Pi\right]\\x=k2\Pi\end{matrix}\right.=>x=0}\)

tai sao x = 0

1) Cach tham chieu den phan tu cua mang

A. <ten bien mang>[ Kieu chi so];

B. <ten kieu mang> [chi so];

C. <ten bien mang> [kieu phan tu];

D.<ten kieu mang> [kieu phan tu];