Ответ №1
4)(2/3)^(2x-1) <= 9/4
2x-1 >= -2
x >= -1/2
5) 4^(x-1) + 1 >= 0
x-1>= 0
x>= 1
6)27^x > 3^(x + 6)
3x > x+6
x > 3
7)3^(x+1) - 3^x + 3^(x - 1) <= 21
(7/3)*3^x <= 21
3^x <= 9
x <= 2
Ответ №1
4)(2/3)^(2x-1) <= 9/4
2x-1 >= -2
x >= -1/2
5) 4^(x-1) + 1 >= 0
x-1>= 0
x>= 1
6)27^x > 3^(x + 6)
3x > x+6
x > 3
7)3^(x+1) - 3^x + 3^(x - 1) <= 21
(7/3)*3^x <= 21
3^x <= 9
x <= 2
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