Вопрос школьника по предмету Математика
Решите неравенство изобразите на корд прямой 9<=2х+3<=15
3 числитель,3х-8 знаменатель < 0
Ответ учителя по предмету Математика
9《2x+3《15;
9-3《2x+3-3《15-3;
6《2x《12;
3《x《6; [3; 6].
3/(3x-8)<0;
3x-8<0;
3x<8;
x<8/3;
x<2 2/3.
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