3n+10 chia het cho n-1

=>3.(n-1)+13 chia het cho n-1

=>13 chia het cho n-1

=>n-1 E Ư(13)={1;13}

=>n E {2;15}

bấm vào số 0 của câu trả lời mình đi

Quy đồng mẫu thức các phân thức sau 3 + 2 x 10 x 4 y , 5 8 x 2 y 2 , 2 3 x y 3

The name of my best friend is Mai. She is my good friend and cares for me a lot. She behaves me well and helps always. I met her in class 6 and became best friend. She is my true friend because she understands me very well and cares for my every need. I like her very much. I never had any friend like her ever before. She comes to my home and I too go to her home. Our parents respects us very much and like our friendship. She is so precious for me and I never want to lose her. Whenever I get absent in the classroom, she helps me in doing all the left home works and class works.

She is much similar to me in many aspects. She never argues me and describes me well anything which I get stuck. She is an open minded girl and never feels bad for my misbehave. She is very entertaining in nature and makes me laugh through her interesting jokes and talks in the spare time. She is very cute and attractive, attracts everyone through her smile and nice way of talk. She promotes me always to do better in the classroom and exams. We are good in sports and academic activities. She takes my opinions in her every tough work to do in the right way. We manage to share things in our difficult times. We always perform better in the class tests and main exams.

Write the comparative or superlative form of the words in brackets:

1. Minh looks (thin) thinner than he did.

2.Mountains are (big) bigger than hills.

3. School days are the (happy) happiest of my life.

4.Who is(good) better,Tom or Tim?

5. It is the(modern) morderner than building in this city.

Write the correct tense of the verbs in brackets:

1.Look!They are playing (play) badminton in the schoolyard.

2.Hunf doesn't often(not go) go camping in the summer.

3.Hanh isn't reading(not read) with the friends at the moment.

4.Does Son write(write) to their friends every summer holiday?

5.They will visit(visit) their grandparents tomorrow.

When ........ the show start ? A. is B.are C.do D.does

1+2+3+4+5+6+7+8+9+10

= 10 x 11 : 2 = 55 

bài này đơn giản thôi