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27/12/2017 lúc 18:59
Ex1: Điền từ thích hợp vào chỗ trống
This is Ba. He(1)......... a student.Every morning he(2).........up at 5.30.He(3).............. his teeth and takes a(4)............... then has breakfast at 6.15. He goes to school(5)........six thirty.His house is(6).............his house so he walks.The classes(7)............at 7.15 and finish at 11.15.In the afternoon he plays sports with his friend,Nam. They play badminton but now they(8).................soccer.In the evening he (9)......his homework and goes to(10).........at 9.30
Ex2:Cho dạng đúng của động từ trong ngoặc
1.My sister(have)...........classes from Monday to Friday
2.She(read)................a book in her room now
3.He(get)........................up at 6.00 every day?
4.There(not be)..............a big yard behind his classroom
27/12/2017 lúc 18:59
Ex1: Điền từ thích hợp vào chỗ trống
This is Ba. He(1)......... a student.Every morning he(2).........up at 5.30.He(3).............. his teeth and takes a(4)............... then has breakfast at 6.15. He goes to school(5)........six thirty.His house is(6).............his house so he walks.The classes(7)............at 7.15 and finish at 11.15.In the afternoon he plays sports with his friend,Nam. They play badminton but now they(8).................soccer.In the evening he (9)......his homework and goes to(10).........at 9.30
Ex2:Cho dạng đúng của động từ trong ngoặc
1.My sister(have)...........classes from Monday to Friday
2.She(read)................a book in her room now
3.He(get)........................up at 6.00 every day?
4.There(not be)..............a big yard behind his classroom
27/12/2017 lúc 18:59
Ex1: Điền từ thích hợp vào chỗ trống
This is Ba. He(1)......... a student.Every morning he(2).........up at 5.30.He(3).............. his teeth and takes a(4)............... then has breakfast at 6.15. He goes to school(5)........six thirty.His house is(6).............his house so he walks.The classes(7)............at 7.15 and finish at 11.15.In the afternoon he plays sports with his friend,Nam. They play badminton but now they(8).................soccer.In the evening he (9)......his homework and goes to(10).........at 9.30
Ex2:Cho dạng đúng của động từ trong ngoặc
1.My sister(have)...........classes from Monday to Friday
2.She(read)................a book in her room now
3.He(get)........................up at 6.00 every day?
4.There(not be)..............a big yard behind his classroom
6x+3=2.(3x-1)+5 chia hết cho 3x-1=> 5 chia hết cho 3x-1=> 3x-1 thuộc Ư(5)={........}
a) x2.x3:7=224
=>x5 :7=224
=>x5 =32
=>x5 =25 => x=2
b)x3 :xx +7=8
=>x3-x =1
=>x3-x =13-x
=> x=1
c) xn =1
=> xn=1n
=> x=1
k cho minh nhee:3
Ta có:
45=5*32
65=5*13
105=5*3*7
Suy ra BCNN của (45;65;105) là 5*32*13*7=4095
Bạn ơi,4095 là BCNN rồi, bạn xem lại thử đề bài nha
Có 4,5,6 là 3 số tn liên tiếp nên (4,5,6)=1
Do đó x-1 chia hết cho 4.5.6=120
Ta tìm được 3 số x-1 là 120, 240,360( do x<400)
Vậy suy ra x là 119, 239, 359
Ta có: \(x-1\in BC\left(4;5;6\right)=\left\{60;120;180;......;360;420;..........\right\}\)
\(\Rightarrow x\in\left\{61;121;181;.......;361;421;.......\right\}\)
mà \(x< 400\)\(\Rightarrow x\in\left\{61;121;181;......;361\right\}\)
Vậy \(x\in\left\{61;121;181;.........;361\right\}\)