Resolva as seguintes inequações, U=Q
A- 7x + 19 > 9x + 25
B- x\2 +1 > x\5 - 1\3
Soluções para a tarefa
Respondido por
0
A)
7x + 19 > 9x + 25
7x - 9x > 25 - 19
- 2x > 6
2x < - 6
x < - 6/2
x < - 3
R.: Sendo U = Q, x < - 3
************************************
B)
x\2 +1 > x\5 - 1\3
x + 1 > x - 1
----- ----- -----
2 5 3
15x + 30 6x - 10
------------- > --------------
30 30
15x + 30 > 6x - 10
15x - 6x > - 10 - 30
9x > - 40
x > - 40
------
9
R.: Sendo U = Q, x > - 40/9
**********************************************
2,5,3: 2
1,5,3: 3
1,5,1: 5
---------------
1,1,1 = 2.3.5 = 30
7x + 19 > 9x + 25
7x - 9x > 25 - 19
- 2x > 6
2x < - 6
x < - 6/2
x < - 3
R.: Sendo U = Q, x < - 3
************************************
B)
x\2 +1 > x\5 - 1\3
x + 1 > x - 1
----- ----- -----
2 5 3
15x + 30 6x - 10
------------- > --------------
30 30
15x + 30 > 6x - 10
15x - 6x > - 10 - 30
9x > - 40
x > - 40
------
9
R.: Sendo U = Q, x > - 40/9
**********************************************
2,5,3: 2
1,5,3: 3
1,5,1: 5
---------------
1,1,1 = 2.3.5 = 30
Perguntas interessantes