Question

ДАЮ 100 БАЛОВ Будь ласка дуже треба 1. Довести, що a · b = (a : c) · (b · c) 2.Довести, що с · х = (с : а) · (х · а). 3.Довести, що -с · х = (с : а) · (х · (-а)). 4. Довести, що -с · х = (с : (-а)) · (х · а)

Answer 1

Пошаговое объяснение:

* знак умножения

1)a*b=(a:c)*(b*c)

(a:c)*(b*c)=$\frac{a}{c} *b*c=\frac{a*b*c}{c} =a*b$

2)c*x=(c:a)*(x*a)

(c:a)*(x*a)=$\frac{c}{a} *x*a=\frac{c*a*x}{a} =c*x$

3) -c*x=(c:a)*(x*(-a))

(c:a)*(x*(-a))=$\frac{c}{a} *x*(-a)=-\frac{c*x*a}{a} =-c*x$

4) -с · х = (с : (-а)) · (х · а)

(с : (-а)) · (х · а)=$-\frac{c}{a} *x*a=-\frac{c*a*x}{a} =-c*x$

Answer 2

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