Предмет: Математика, автор: grishann2

здрастуйте, обьясните пожалуйста, можно в неравенствах и уравнениях умножать на X или нет ??? есть ли общиие правило ?

Ответы

Автор ответа: Katuurina
0
В неравенствах нужно находить корни уравнения(чему равен х), если вы умножаете на х, то на х умножается КАЖДЫЙ член уравнения\неравенства, а значит это ничего не дает и смысла не имеет.

grishann2: нет а если пример X+6/x=2 можно тут умножить на X обе части или нет ?
Katuurina: если есть деление на неизвестное, то тут лучше приводить к общему знаменателю, иначе можно потерять ОДЗ (т.к. х не должен = 0 и если у вас в ответе получится, что х=0 входит и вы забудете ОДЗ из-за умножения, то это ошибка)
Katuurina: ОДЗ - область допустимых значений
Автор ответа: 111САБИНА111
0
например:
4*х=16
Х=16/4
х=4
тоесть если даже ты умножишь на Х,то всеровно ты разделишь в конце это число,чтобы получить ответ Х
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