Odpowiedź:
[tex]x=\frac{3}{2}\\y=-\frac{1}{4}\\z=-\frac{3}{8}\\\\[/tex]
a)
[tex]\frac{x-y}{y-z}=\frac{\frac{3}{2}-(-\frac{1}{4})}{-\frac{1}{4}-(-\frac{3}{8})}=\frac{\frac{6}{4}+\frac{1}{4}}{-\frac{2}{8}+\frac{3}{8}}=\frac{\frac{7}{4}}{\frac{1}{8}}=\frac{7}{4}*\frac{8}{1}=14[/tex]
b)
[tex]\frac{x+y-z}{y+z}=\frac{\frac{3}{2}-\frac{1}{4}-(-\frac{3}{8})}{-\frac{1}{4}-\frac{3}{8}}=\frac{\frac{12}{8}-\frac{2}{8}+\frac{3}{8}}{-\frac{2}{8}-\frac{3}{8}}=\frac{\frac{13}{8}}{-\frac{5}{8}}=\frac{13}{8}*(-\frac{8}{5})=(-\frac{13}{5})[/tex]
c)
[tex]\frac{x-y+2z}{x+y+3z}=\frac{\frac{3}{2}-(-\frac{1}{4})+2(-\frac{3}{8})}{\frac{3}{2}-\frac{1}{4}+3(-\frac{3}{8})}=\frac{\frac{6}{4}+\frac{1}{4}-\frac{3}{4}}{\frac{12}{8}-\frac{2}{8}-\frac{9}{8}}=\frac{1}{\frac{1}{8}}=8[/tex]
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Odpowiedź:
[tex]x=\frac{3}{2}\\y=-\frac{1}{4}\\z=-\frac{3}{8}\\\\[/tex]
a)
[tex]\frac{x-y}{y-z}=\frac{\frac{3}{2}-(-\frac{1}{4})}{-\frac{1}{4}-(-\frac{3}{8})}=\frac{\frac{6}{4}+\frac{1}{4}}{-\frac{2}{8}+\frac{3}{8}}=\frac{\frac{7}{4}}{\frac{1}{8}}=\frac{7}{4}*\frac{8}{1}=14[/tex]
b)
[tex]\frac{x+y-z}{y+z}=\frac{\frac{3}{2}-\frac{1}{4}-(-\frac{3}{8})}{-\frac{1}{4}-\frac{3}{8}}=\frac{\frac{12}{8}-\frac{2}{8}+\frac{3}{8}}{-\frac{2}{8}-\frac{3}{8}}=\frac{\frac{13}{8}}{-\frac{5}{8}}=\frac{13}{8}*(-\frac{8}{5})=(-\frac{13}{5})[/tex]
c)
[tex]\frac{x-y+2z}{x+y+3z}=\frac{\frac{3}{2}-(-\frac{1}{4})+2(-\frac{3}{8})}{\frac{3}{2}-\frac{1}{4}+3(-\frac{3}{8})}=\frac{\frac{6}{4}+\frac{1}{4}-\frac{3}{4}}{\frac{12}{8}-\frac{2}{8}-\frac{9}{8}}=\frac{1}{\frac{1}{8}}=8[/tex]