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Автор - orhid57

СРОЧНО!!! Дам 77 баллов! Из формулы 1:х=1:у - 1:z выразите:
а) х через у и z б) z через х и у

Ответ

Автор - Serg1956
1/у-1/z=(z-y)/zy  поэтому x=(zy)/z-y

Аналогично z=(xy)/(x-y)

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