sos.......sos.......

giúp đi mè....sos

Ta có:

\(3^{n+3}+2^{n+3}+3^{n+1}+2^{n+2}=3^3.3^n+2^3.2^n+3^1.3^n+2^2.2^n\\ =3^n\left(3^3+3^1\right)+2^n\left(2^3+2^2\right)\\ =6.5.3^n+6.2.2^n\\ =6\left(5.3^n+2.2^n\right)\)

Vì \(6⋮6\Rightarrow6\left(5.3^n+2.2^n\right)⋮6.đpcm\)

a, 54 x63 -63 x53 -20-43

= 63x (54-53) -20-43

=63 x1 -20-43

=(63-43 ) -20 

 =20-20= 0

b, 19 x (38+53 ) - 9x (53+38)

= (53+38) x (19-9) 

= 91 x 10 = 910

c,

10000 -42 x72-42 x28

10000- 42x (72+28) 

=10000- 42 x 100

=10000 - 4200 =5800

Ai làm nhanh mình sẽ tịk cho nhé 

Lời giải:

Thể tích của bể nước là:
$16.16.16.35=143360$ (cm³)

Đổi $143360$ cm³ = $0,14336$ m³

1. Kids will find volunteering to protect animals very enjoyable.
Kids will enjoy volunteering to protect animals.
2. Hoa doesn’t like playing computer games at all.
Hoa is not keen on playing computer games.
3. I think living in the country is healthier than living in the city.
I don’t think living in the city is as healthy as living in the country.
4. My brother usually spends two weeks carving one eggshell.
It usually takes my brother two weeks to carve one eggshell.
5. If you want to lose weight, you shouldn’t eat junk food.
Don’t eat junk food if you want to lose weight. 

56/10=5,6

4/100=0,04

56/10=5,6             ;         4/100=0,04

Giúp mik vs 9h mik phải nộp bài rồi

đường chéo 1:(86-22):2=32(cm)

đường chéo 2: 86-32=54(cm)

diện tích hình thoi:(32x54)x1/2=863(cm²)

tự viết lời giải nha!!!!!!!

54/12=450/100=4,5