Đa thức f(x) nếu có nghiệm nguyên thì nghiệm đó phải là ước của -1

Các ước của -1 là 1 và -1

Xét f(1) = -3 khác 0

f(-1) = -11 khác 0

Do đó: f(x) không có nghiệm nguyên

d)=(x+1/2)³

Số tự nhiên lớn nhất có 3 chữ số: 999.

 Trần Minh Lộc tra google

123456789/987654321=13717421/109739369

123456789 :13717421 = 9

Hì hì!

nó bằng 1600cm vuông

IV/ Choose the best answer from the following sentences

1/ I do not …………..English well every night .

A/ speak B/ to speak C/ speaking D/ speaks

2/ John …………punished badly by his teacher last Tuesday.

A/ are B/ was C/ is D/were

3/ When I was a child, I used to…………..soccer at the village common.

A/ playing B/ plays C/ play D/ played

4/ I don/t have a computer . I wish I ……….it in my house.

A/ have B/ has C/ had D/ to have

5/ It is very hot today . I wish it……….today for me toplay games

A/ is warm B/ are warm C/ were warm D/ am warm

6/ Remember …………..give my love to everybody.

A/ on B/ for C/ of D/ to

7/ Keep silent please ! Listen ………..my explanation .

A/ to B/ for C/ at D/ in to

8/ I am looking forward to……………you some day .

A/ seeing B/ saw C/ see D/ sees

9/ Mary and Peter will go to the movie theater………………..

A/ now B/ yesterday C/ tomorrow D/ today

10/ Tom is doing his homework ………………………………….

A/ today B/ tomorrow C/ yesterday D/ now

11/ If it does not rain this afternoon, I ……………..to GiaLai .

A/ will go B/ did go C/ have gone D/ has gone

12/ When I was having dinner. , my friend …………..yesterday

A/ come B/ came C/ to come D/ coming

13/ Hoa Learns English badly . She wishes she ………..it well

A/ learned B/ to learn C/ learning D/ learns

14/ I ……………understand the lesson yesterday because my friends were noisy.

A/ do not B/ does not C/ am not D/ did not

15/ English is………….all over the world by many people.

A/ spoken B/ speaks C/ speaking D/ spoke

16/ I did not ……………..play football when I was young

A/ used to B/ use to C/ using to D/ used to be

17/ Nam said that he …………..hungry then.

A/ is B/ are C/ were D/ was

18/ Mr. Pike is very proud…………..his son.

A/ on B/ in C/ to D/ of

19/ Are you interested…………….studying English ?

A/ in B/ on C/ of D/to

20/ Jack has studied VietNamese…………2002

A/ to B/ since C/ for D/ about

ông già nói:-Nhà vua nợ tôi 100000000000000 rúp .