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\(\frac{-5}{3}\) | ||||
\(\frac{3}{4}\) | \(\frac{7}{10}\) | |||
\(\frac{-17}{30}\) |
+ | \(-\frac{1}{2}\) | \(\frac{5}{9}\) | \(\frac{1}{36}\) | \(-\frac{11}{18}\) |
\(-\frac{1}{2}\) | -1 | \(\frac{1}{18}\) | -\(\frac{17}{36}\) | -\(\frac{10}{9}\) |
\(\frac{5}{9}\) | \(\frac{1}{18}\) | 1 | \(\frac{7}{12}\) | \(-\frac{1}{18}\) |
\(\frac{1}{36}\) | \(\frac{17}{36}\) | \(\frac{7}{12}\) | 1 | \(-\frac{7}{12}\) |
\(-\frac{11}{18}\) | \(-\frac{10}{9}\) | \(-\frac{1}{18}\) | \(\frac{7}{12}\) | -1 |
a | \(\dfrac{-2}{3}\) | \(\dfrac{4}{15}\) | \(\dfrac{9}{4}\) | \(\dfrac{5}{9}\) | \(\dfrac{5}{4}\) | \(\dfrac{4}{16}\) | 0 | \(\dfrac{12}{18}\) | \(\dfrac{-4}{10}\) | 0 |
b | \(\dfrac{4}{5}\) | \(\dfrac{5}{8}\) | \(\dfrac{-2}{3}\) | \(\dfrac{5}{14}\) | \(\dfrac{-2}{4}\) | 1 | \(\dfrac{-5}{12}\) | 0 | \(\dfrac{-17}{42}\) | |
a.b | \(\dfrac{-8}{5}\) | \(\dfrac{1}{6}\) | \(\dfrac{-3}{2}\) | \(\dfrac{25}{126}\) | \(\dfrac{-5}{8}\) | \(\dfrac{4}{16}\) | 0 | \(\dfrac{12}{18}\) | 0 | 0 |
\(\frac{a}{b}\) | \(-\frac{3}{4}\) | \(\frac{4}{5}\) | \(-\frac{7}{11}\) | 0 |
\(-\frac{a}{b}\) | \(\frac{3}{4}\) | \(-\frac{4}{5}\) | \(\frac{7}{11}\) | 0 |
\(-\left(-\frac{a}{b}\right)\) | \(-\frac{3}{4}\) | \(\frac{4}{5}\) | \(-\frac{7}{11}\) | 0 |
tk mk nha
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NHÂN | \(\frac{2}{3}\) | \(\frac{-5}{6}\) | \(\frac{7}{12}\) | \(\frac{-1}{24}\) |
\(\frac{2}{3}\) | \(\frac{4}{9}\) | \(\frac{-5}{9}\) | \(\frac{7}{18}\) | \(\frac{-1}{36}\) |
\(\frac{-5}{6}\) | \(\frac{-5}{9}\) | \(\frac{25}{36}\) | \(\frac{-35}{72}\) | \(\frac{5}{144}\) |
\(\frac{7}{12}\) | \(\frac{7}{18}\) | \(\frac{-35}{72}\) | \(\frac{49}{144}\) | \(\frac{-7}{288}\) |
\(\frac{-1}{24}\) | \(\frac{-1}{36}\) | \(\frac{5}{144}\) | \(\frac{-7}{288}\) | \(\frac{1}{576}\) |
nhân | 2/3 | -56 | 7/12 | -1/24 |
2/3 | 4/9 | -5/9 | 7/18 | -1/36 |
-5/6 | -5/9 | 25/36 | -35/72 | 5/144 |
7/12 | 7/18 | -35/72 | 49/144 | -7/288 |
-1/24 | -1/5 | 5/144 | -7/288 | 1/576 |
+ x = 5, y = –7 thì x . y = 5. ( –7) = – (5 . 7) = –35.
+ x = –18, y = 10 thì x . y = (–18) . 10 = – (18 . 10) = –180.
+ y = –10 ; x.y = x . (–10) = – (x.10) = – 180, do đó x . 10 = 180 nên x = 18.
+ x = –25; x.y = (–25).y = –(25.y) = –1000, do đó 25.y = 1000 nên y = 40.