Đề bài chưa rõ ràng lắm...

\(a,A=\left\{100;110;130;310;300;160;360;600;630;610\right\}\)

\(b,B=\left\{360;630;603;306\right\}\)

\(c,C=A\cap B=\left\{360;630\right\}\)

8 = 2³

9 = 3²

11 = 11

BCNN(8;9;11) = 2³.3².11 = 792

8 = 2^3

9 = 3^2 

11 = 11

Chọn các thừa số nguyên tố chung và riêng : 2 ; 3;11

=> BCNN(8;9;11) = 2^3* 3^2*11 = 792

40

\(8=2^3\)

\(10=2\times5\)

\(20=2^2\times5\)

\(\RightarrowƯCLN\left(8;10;20\right)=2\)

\(24=2^3\times3\\84=2^2\times3\times7\\ 180=2^2\times3^2\times5\\ =>UCLN\left(24;84;180\right)=2^2\times3=12\)

Ta có: \(24=2^3.3;84=2^2.3.7;180=2^2.3^2.5\)

\(\Rightarrow\text{Ư}CLN\left(24,84,180\right)=2^2.3=12\)

1. Ta có: \(16=2^4;80=2^4.5;176=2^4.11\)

\(\Rightarrow\text{ƯCLN}\left(16,80,176\right)=2^4=16\)

2. Ta có: \(6=2.3;8=2^3;18=3^2.2\)

\(\Rightarrow\text{ƯCLN}\left(6,8,18\right)=2\)

16 

2

\(\left(\dfrac{1}{3}-\dfrac{3}{10}\right):\dfrac{3}{5}+\left(\dfrac{2}{3}-\dfrac{7}{10}\right):\dfrac{3}{5}\)
\(=\left(\dfrac{1.10}{3.10}-\dfrac{3.3}{10.3}\right).\dfrac{5}{3}+\left(\dfrac{2.10}{3.10}-\dfrac{7.3}{10.3}\right).\dfrac{5}{3}\)

\(=\left(\dfrac{10}{30}-\dfrac{9}{30}\right).\dfrac{5}{3}+\left(\dfrac{20}{30}-\dfrac{21}{30}\right).\dfrac{5}{3}\)

\(=\dfrac{1}{30}.\dfrac{5}{3}-\dfrac{1}{30}.\dfrac{5}{3}\)

\(=\dfrac{5}{3}.\left(\dfrac{1}{30}-\dfrac{1}{30}\right)\)

\(=\dfrac{5}{3}.0\)

\(=0\)

giúp mik với

=5^10

\(5^3\times5^7=5^{3+7}=5^{10}\)

\(\left(1+\dfrac{1}{2}\right)\times\left(1+\dfrac{1}{3}\right)\times\left(1+\dfrac{1}{4}\right)\times....\times\left(1+\dfrac{1}{98}\right)\times\left(1+\dfrac{1}{99}\right)\)

\(=\dfrac{3}{2}\times\dfrac{4}{3}\times\dfrac{5}{4}\times...\times\dfrac{99}{98}\times\dfrac{100}{99}\)

\(=\dfrac{1\times100}{2\times1}\)

\(=\dfrac{100}{2}\\ =50\)

50

Đề bài bị thiếu em nhé,

12 \(\times\)? Dấu ? là bao nhiêu thì mới làm được em ha