Вопрос школьника по предмету Математика
3^2x-1+3^2x-2-3^2x-4=315
Ответ учителя по предмету Математика
3 ^ 2х • ( ( 1/3 ) + ( 1/9 ) — ( 1/81 )) = 315
1/3 + 1/9 — 1/81 = 27/81 + 9/81 — 1/81 = 35/81
3 ^ 2х • 35/81 = 315
3 ^ 2х = 315 : 35/81
3 ^ 2х = 9 • 81
3 ^ 2х = 3 ^ 6
2х = 6
Х = 3
Похожие вопросы от пользователей
Alex __________ speak Chinese, but he is planning to start learning next year. 17 Last year, our employees __________ use the new software, so we hired a consultant to teach them. 18 __________ you like to take a career break? 19 Naruto __________ get a promotion at GFS, so he wants to move to another company. 20 Do you think you __________ recommend one or two employment agencies?