f(x) = 0 

3x-6 = 0

3x = 6

x =2

vậy nghiệm đa thức là 2

Section I: Choose the word which has the underlined part pronounced differently from the others.(1pt)

1. A. school                 B. chair                  C. chemistry              D. character

2. A. serious                B. symptom           C. sugar                     D. sauce

3. A. order                   B. novel                 C. portable                 D. score

4. A. coop                   B. cartoon              C. stool                      D. indoors

Ve xau qua di !!!!!!!!!!!

When I was a boy, I .... tea to coffee.

A. Prefer B. Preferred C. Prefers D. Preferring

2. He was only thirteen, but he ate .... his father did.

A..As much as B. More that C. Much than D. As much than

3. ​could you show ne the way ..... the railway station please?

A. Near to B.at C. Next D. To

4"Was the competition a success?" "Yes, .... people took part in it than usual". 

A. More B. Fewer C. Less D. Many

5. Some scientist spend most OF their lives ... at rocks.

A. Look B. Looking C.looked D. To look

Khi cho kaliđicromat vào dung dịch HCl dư, đun nóng xảy ra phản ứng

K₂Cr₂O₇+HCl→KCl+CrCl₃+Cl₂+H₂O

Nếu dùng 4,41 gam K₂Cr₂O₇ thì số mol HCl bị oxi hóa là

A. 0,12 mol

B. 0,09 mol

C. 0,06 mol

D. 0,14 mol