Odpowiedzi

2009-11-02T16:55:26+01:00
1) [4x - 1] < 3
4x<3+1
4x<4
x<1

2) [2 - 3x] <= 1
-3x<=1-2
3x<=-1+2
x<= 1/3

3) [4 - 3x] >= 2
-3x>=2-4
3x>=-2+4
x>=2/3

4) (7x + 1)^2 <-- to jest pod pierwiastkiem <= 13
7x + 1 <= 169
7x <= 169 -1
7x <= 168
x <= 24

:}
2009-11-02T17:02:19+01:00
1)
4x-1<3 /+1
4x<4 /:4
x<1

2)
2-3x<=1 /-2
-3x<= -1 /:(-3)
x<= 1/3

3)
4 - 3x >= 2 /-4
-3x >= -2 /: (-3)
x>= 2/3

4)
(7x + 1)√2 <= 13 /:√2
7x+1<= 13/ √2 /-1
7x<=12:√2 /7
x<=12:√2:7