3.C

6.A

8.D

9.B

10.D

3c

6a

8c

9b

10d

2. BCNN(15,88)=1320

BCNN(45,120,36)=360

BCNN(28,30,98)=2940

Bài 3: 

3=3

8=2³

16=2⁴

84=2²x3x7

120=2³x3x5

145=5x29

a:=>0,792:y=3,96

=>y=0,2

b: Thể tích là:

\(\left(\sqrt{\dfrac{100}{4}}\right)^3=5^3=125\left(m^3\right)\)

0,792 : y = 11 - 7,04

=> 0,972 :y=3,96

=> y = 0,972:3,96

=> y = 0,2

một hlp có diện tích xung quanh là 100m2 thì thể ticchs hlp đó là : 125 cm³

1, peaceful

2,nomandic

3,collector

4,inconvenient

5,unsafe

6,friendly

7,healthy

8,traditional

9,generousity

10,soundly

1 peaceful

2 nomadic

3 collector

4 inconvenient

5 unsafe 

6 friendly

7 healthily

8 traditional

9 generousity 

10 soundless

1 than

2 as

3 more

4 than

5 more

6 than

7 as

8 than

1. than

2. as

3. more

4. than

5. more

6. than

7. as

8. than

\(P=\dfrac{\sqrt{x}+5\sqrt{x}-4}{\sqrt{x}\left(\sqrt{x}-2\right)}:\dfrac{x-4-x}{\sqrt{x}\left(\sqrt{x}-2\right)}=\dfrac{6\sqrt{x}-4}{-4}=\dfrac{2-3\sqrt{x}}{2}\)

\(P=\left(\dfrac{1}{\sqrt{x}-2}+\dfrac{5\sqrt{x}-4}{x-2\sqrt{x}}\right):\left(\dfrac{2+\sqrt{x}}{\sqrt{x}}-\dfrac{\sqrt{x}}{\sqrt{x}-2}\right)\)

\(=\dfrac{2\left(3\sqrt{x}-2\right)}{\sqrt{x}\left(\sqrt{x}-2\right)}:\dfrac{x-4-x}{\left(\sqrt{x}-2\right)\cdot\sqrt{x}}\)

\(=\dfrac{-3\sqrt{x}+2}{2}\)

A

2A

8D

2A, 8D nha