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a) goi hai so la a ; b va a >b
vi UCLN(a,b)=18=>a=18k ; b=18q (trong do UCLN (k,q)=1 va k>q)
=>a+b=162
18k+18q =162
18(k+q)=162
k+q=9
ta co bang sau | |||||||||||||||||||||||
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21453
52542000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 | 542454550212.100000000000000000000000000000000000000000000000000000000000000000000000000000 |
Từ x:y = 4:5 => \(\frac{x}{y}=\frac{4}{5}\) => \(\frac{x}{5}=\frac{y}{4}\) => \(\frac{x}{55}=\frac{y}{44}\)
x:z = 7:11 => \(\frac{x}{z}=\frac{7}{11}\) => \(\frac{x}{11}=\frac{z}{7}\) => \(\frac{x}{55}=\frac{z}{35}\)
=> \(\frac{x}{55}=\frac{y}{44}=\frac{z}{35}\)
Đặt: \(\frac{x}{55}=\frac{y}{44}=\frac{z}{35}=k\Rightarrow\begin{cases}x=55k\\y=44k\\z=35k\end{cases}\)
Lại có BCNN(x,y,z) = 11.5.4.7k = 1540k = 4620 => k = 3
=> \(\begin{cases}x=165\\y=132\\z=105\end{cases}\)
tam giác bn nha!
ý nghĩa: tam giác là tác giam, tác là đánh, giam là nhốt. Đánh nhốt là đốt nhánh, đốt là thiu, nhánh là cành, thiu cành là thanh cìu.Thank you every one!
bội chung nhỏ nhất của số mấy thế
Tìm BCNN của 2,3,4,6,8,9 đó