Có thể và các tỉ số đó là:
\(\dfrac{3}{9}=\dfrac{81}{243}\) \(\dfrac{9}{27}=\dfrac{81}{243}\) \(\dfrac{3}{27}=\dfrac{9}{81}\)
\(\dfrac{3}{81}=\dfrac{9}{243}\) \(\dfrac{9}{81}=\dfrac{27}{243}\) \(\dfrac{3}{9}=\dfrac{27}{81}\)
\(\dfrac{9}{3}=\dfrac{243}{81}\) \(\dfrac{27}{9}=\dfrac{243}{81}\) \(\dfrac{9}{3}=\dfrac{81}{27}\)
\(\dfrac{243}{9}=\dfrac{81}{3}\) \(\dfrac{81}{9}=\dfrac{243}{27}\) \(\dfrac{81}{9}=\dfrac{27}{3}\)
Có thể và các tỉ lệ thức là :
\(\dfrac{3}{9}=\dfrac{81}{243}\);\(\dfrac{3}{81}=\dfrac{9}{243}\);\(\dfrac{9}{3}=\dfrac{243}{81}\);
\(\dfrac{243}{9}=\dfrac{81}{3}\)
\(\dfrac{9}{27}=\dfrac{81}{243}\);\(\dfrac{9}{81}=\dfrac{27}{243}\);\(\dfrac{27}{9}=\dfrac{243}{81}\);
\(\dfrac{81}{9}=\dfrac{243}{27}\)
\(\dfrac{3}{27}=\dfrac{9}{81}\); \(\dfrac{3}{9}=\dfrac{27}{81}\); \(\dfrac{9}{3}=\dfrac{81}{27}\); \(\dfrac{81}{9}=\dfrac{27}{3}\)
theo bài ra ta có các đẳng thức sau:
\(3.243=9.81\\ 3.81=9.27\\ 9.243=27.81\)
từ mỗi đẳng thức trên ta suy ra các tỉ lệ thức :
\(\dfrac{3}{9}=\dfrac{81}{243};\dfrac{3}{81}=\dfrac{9}{243};\dfrac{243}{9}=\dfrac{81}{3};\dfrac{243}{81}=\dfrac{9}{3}\)
\(\dfrac{3}{9}=\dfrac{27}{81};\dfrac{3}{27}=\dfrac{9}{81};\dfrac{81}{9}=\dfrac{27}{3};\dfrac{81}{27}=\dfrac{9}{3}\\ \dfrac{9}{27}=\dfrac{81}{243};\dfrac{9}{81}=\dfrac{27}{243};\dfrac{243}{27}=\dfrac{81}{9};\dfrac{243}{81}=\dfrac{27}{9}\)
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