Предмет: Математика, автор: toshachernov

Найдите модуль каждого из чисел: 81; 1,3 ; -5,2 ;8/9 ;-5/7 ; 2 9/25 ; - 52 ; 0. найдите соответствующие равенства.

ПОМОГИТЕ СРОЧНО, Я ТЕМУ НЕ ПОНИМАЮ , ТАК КАК 3 НЕДЕЛИ В ШКОЛЕ НЕ БЫЛ. ПОМОГИТЕ РЕШИТЬ, ПОЖАЛУЙСТА!

Ответы

Автор ответа: Аноним

Если совсем по простому, то какое бы число не стояло под знаком модуль оно будет положительным.
/81/=81 /1,3/=1,3 /-5,2/=5,2 /8/9/=8/9 /-5/7/=5/7 /2 9/25/=2 9/25
/-52/=52 /0/=0
Если под знаком модуля стоит неизвестное число, то оно имеет два значения,кроме 0
/х/=5 х=5 и х=-5
/х+3/=1 х+3=1⇒х=-2 и х+3=-1⇒х=-4
Не знаю,понятно ли объяснила? Если что,обращайся.

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