a) 0,(4) = 0,(1) . 4
= \(\frac{1}{9}\) . 4
= \(\frac{4}{9}\)
b) 0,1(4) = 1,(4) . \(\frac{1}{10}\)
= \(\left[1+0,\left(4\right)\right].\frac{1}{10}\)
= \(\left(1+\frac{4}{9}\right).\frac{1}{10}\)
= \(\frac{13}{9}.\frac{1}{10}\)
= \(\frac{13}{90}\)
Chúc bạn học tốt
a) 0,(4) = 0 + \(\frac{4}{9}\)
= \(\frac{4}{9}\)
b) 0,1(4)
= 0,1 + \(\frac{4}{90}\)
= \(\frac{1}{10}+\frac{4}{90}\)
\(\frac{9}{90}+\frac{4}{90}\)
= \(\frac{13}{90}\)
a) 0,(4) = 0,(1) . 4
= \(\frac{1}{9}\) . 4
= \(\frac{4}{9}\)
b) 0,1(4) = 1,(4) . \(\frac{1}{10}\)
= [1+0,(4)].\(\frac{1}{10}\)
= (1+\(\frac{4}{9}\)).\(\frac{1}{10}\)
= \(\frac{13}{9}\).\(\frac{1}{10}\)
= \(\frac{13}{90}\)