1) So dong phan este cua CH₂O₂

1) Phan ung xa phong hoa este co dac diem 

A. thuan nghich           B. hoan toan       C. cham    D. co gioi han

1) Tim tat ca GT cua m de ham so y = (m-3)x³ - 2mx² + 3 khong co cuc tri

Xet TH₁: m = 3

TH₂ m ≠ 3 => tai sao lai xet Δ ≤ 0 ma khong phai Δ < 0

1) Tim closest

a) Whenever problems come up, we discuss them frankly and find solutions quickly

A. happen      B. encounter    C. arrive  D. clean

b) My brothers love joining my dad mending things around the house at weekends

A. repairing    B. amending    C. replacing      D. impairing

c) John is the black sheep of the family. He is currently serving 5 years in jail for stealing a car

A. a member of  a family who is regarded as a disgrace and an embrassment

B. a member of a family who support family by raising sheep

C. a member of a family who confers prestige on his family

D. a breadwinner

d) She is over the moon because she has just known that she is in the family way

A. be promoted B. be praised       c. be pregnant   D. be criticized

e) a slap in the face

A. a pleasure      B. a dispointment C. an insult

1) Tim closest 

a) In the 20^th century, most of the traditional attiudes to remarriage are changing

A. conventional       B. contemporary          C.latest          D. new

b) The government needs to seek a solution to prevent domestic violence as soon as possible

A. recreation         B. remedy             C. keywork         D. attempt

c) Billy, come and give me a hand with cooking

A. help B. encounter     C. arrive        D. clean

1) Tim tu dong nghia

a) My mother takes the responsibility for running the household

A. is    B. makes       C. assumes    D. does

b) Both my parents join hands to give us a nice house and a happy home

A. give a hand          B. work separately          C. work hard    D. work together

c) In spite of opverty, we manage to raise our children poperly

A. give up      B. go up        C. make up           D. bring up

1) As a housewife, she stays at home and ...........her children. she takes care of them, feeds them and protects them to develop

A. nurtures         B. nurture       C. nature        D. natures

1) There are a lot of dirty clothes and sheets in Tom's room, so it's time for him to do his...............

A. washing - up        B. garbage        C. laundry            D. household chores

1) Cho ham so f(x) co dao ham cap 2 tren R. Xet cac khang dinh sau

i) Neu ham so f(x) dat cuc tieu tai x = x_o thi \(\left\{{}\begin{matrix}f'\left(x_o\right)=0\\f''\left(x_o>0\right)\end{matrix}\right.\)

ii) Neu ham so f(x) dat cuc dai tai x = x_o thi \(\left\{{}\begin{matrix}f'\left(x_o\right)=0\\f''\left(x_o\right)< 0\end{matrix}\right.\)

iii) Neu f''(x_o) = 0 thi ham so f(x) khong dat cuc tri tai x = x_o

So khang dinh dung trong cac khang dinh tren la:

A. 0          B. 1          C. 2          D.3