Proszę o rozwiązanie ale ROZPISANIE :D
a)
3x/2 - 1 > x/4 /* 4
6x - 4 > x
6x - x > 4
5x > 4
x > 4/5
b)
x/3 - 3x/5 ≥ -1 /*15
5x - 9x ≥ -15
-4x ≥ -15
x ≤ 15/4
c)
............ / * 12
3(x - 9) - 8(3x - 1) ≥ 0
3x - 27 - 24x + 8 ≥ 0
-21x ≥ 19
x ≤ -19/21
d) ............ / * 10
5(3x - 1) - 2(2x + 1) ≤ x + 1
15x - 5 - 4x - 2 ≤ x +1
11x - x ≤ 1 + 7
10x ≤ 8
x ≤ 8/10
e)
................. / * 4
8x - 2(x - 1) < 2(3x - 1) + 4x
8x - 2x + 2 < 6x - 2 + 4x
6x + 2 < 10x - 2
6x - 10x < -2 - 2
-4x < - 4 / :(-4)
x > 1
f)
............. /*4
2x + 1 - 4x ≥ 2(1 - x)
-2x + 1 ≥ 2 - 2x
-2x + 2x ≥ 2 -1
0 ≥ 1 (fałsz)
x ∈ {Ф}
12.
3x/2 -1 > x/4 I*4
6x-4 > x
6x-x > 4
x/3 - 3x/5 ≥ -1 I*15
5x-9x ≥ -15
-4x ≥ -15 /:(-4)
(x-9)/4 - 2(3x-1)/3 ≥ 0 I*12
3(x-9) -8(3x-1) ≥ 0
3x-27-24x+8 ≥ 0
-21x ≥ 19 /:9-21)
x = -19/21
d)
(3x-1)/2 -(2x+1)/5 ≤ (x+1)/10 *10
5(3x-1)-2(2x+1) ≤ x+1
15x-5-4x-2 ≤ x+1
x ≤4/5
2x-(x-1)/4 < (3x-1)/2 + x I*4
8x-x+1 < 2(3x-1) +4x
7x+1 < 6x-2+4x
-3x < -3 /:(-3)
(2x+1)/4 - x ≥ (1-x)/2 I*4
2x+1 -4x ≥ 2(1-x)
-2x+1 ≥ 2-2x
-2x+2x ≥ 2-1
0 ≥ 1, sprzeczność, brak rozwiązania
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a)
3x/2 - 1 > x/4 /* 4
6x - 4 > x
6x - x > 4
5x > 4
x > 4/5
b)
x/3 - 3x/5 ≥ -1 /*15
5x - 9x ≥ -15
-4x ≥ -15
x ≤ 15/4
c)
............ / * 12
3(x - 9) - 8(3x - 1) ≥ 0
3x - 27 - 24x + 8 ≥ 0
-21x ≥ 19
x ≤ -19/21
d) ............ / * 10
5(3x - 1) - 2(2x + 1) ≤ x + 1
15x - 5 - 4x - 2 ≤ x +1
11x - x ≤ 1 + 7
10x ≤ 8
x ≤ 8/10
e)
................. / * 4
8x - 2(x - 1) < 2(3x - 1) + 4x
8x - 2x + 2 < 6x - 2 + 4x
6x + 2 < 10x - 2
6x - 10x < -2 - 2
-4x < - 4 / :(-4)
x > 1
f)
............. /*4
2x + 1 - 4x ≥ 2(1 - x)
-2x + 1 ≥ 2 - 2x
-2x + 2x ≥ 2 -1
0 ≥ 1 (fałsz)
x ∈ {Ф}
12.
a)
3x/2 -1 > x/4 I*4
6x-4 > x
6x-x > 4
5x > 4
x > 4/5
b)
x/3 - 3x/5 ≥ -1 I*15
5x-9x ≥ -15
-4x ≥ -15 /:(-4)
x ≤ 15/4
c)
(x-9)/4 - 2(3x-1)/3 ≥ 0 I*12
3(x-9) -8(3x-1) ≥ 0
3x-27-24x+8 ≥ 0
-21x ≥ 19 /:9-21)
x = -19/21
d)
(3x-1)/2 -(2x+1)/5 ≤ (x+1)/10 *10
5(3x-1)-2(2x+1) ≤ x+1
15x-5-4x-2 ≤ x+1
10x ≤ 8
x ≤4/5
e)
2x-(x-1)/4 < (3x-1)/2 + x I*4
8x-x+1 < 2(3x-1) +4x
7x+1 < 6x-2+4x
-3x < -3 /:(-3)
x > 1
f)
(2x+1)/4 - x ≥ (1-x)/2 I*4
2x+1 -4x ≥ 2(1-x)
-2x+1 ≥ 2-2x
-2x+2x ≥ 2-1
0 ≥ 1, sprzeczność, brak rozwiązania