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Волчица23
@Волчица23
August 2022
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С объяснением пожалуйста :([tex] \frac{7}{z-7}- \frac{z}{z-7}
и
\frac{t}{t-2} + \frac{2}{2-t}
[/tex]
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ЕкарныйБабай
Знаменать равен - значит числитель вычитаем
a/b-c/b=(a-c)/b
и a-b=-(b-a)
z-7=-(7-z)
2-t=-(t-2)
---------------------
1/ 7/(z-7)-z/(z-7)=(7-z)/(z-7)=-(z-7)/(z-7)=-1
2/ t/(t-2)+2/(2-t)=t/(t-2)-2/(t-2)=(t-2)/(t-2)=1
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Answers & Comments
a/b-c/b=(a-c)/b
и a-b=-(b-a)
z-7=-(7-z)
2-t=-(t-2)
---------------------
1/ 7/(z-7)-z/(z-7)=(7-z)/(z-7)=-(z-7)/(z-7)=-1
2/ t/(t-2)+2/(2-t)=t/(t-2)-2/(t-2)=(t-2)/(t-2)=1