Tentukan himpunan penyelesaian dari pertidaksamaan berikut,jika variabel pada himpunan bilangan bulat.. a)1/2t-1<1/3(t-4) b)3/4y<6 c)2/3(p-1)>1/5p+2 d)1/3(x+2)>2+3x/2 e)1/3x+1 tidak kurang dari sama dengan 1/2(x-1)
saya beri poin 50.gk jwb rugi
Zuhh
A. 1/2 t - 1 < 1/3 (t-4) ,.....dikali 6 3t - 6 < 2 (t-4) 3t - 6 < 2t - 8 3t - 2t < -8 + 6 t < -2 t < - 2 Hp {....,-5,-4,3 }
b. 3/4y < 6 3 < 6 x 4y 3 < 24 y 3/24 < y 0,25 < y Hp { ...,-1,0}
3t - 6 < 2 (t-4)
3t - 6 < 2t - 8
3t - 2t < -8 + 6
t < -2
t < - 2
Hp {....,-5,-4,3 }
b. 3/4y < 6
3 < 6 x 4y
3 < 24 y
3/24 < y
0,25 < y
Hp { ...,-1,0}
c. 2/3 (p-1) > 1/5p + 30 ......dikali 15
10(p-1) > 3p + 30
10p - 10 > 3p + 30
10p - 3p > 30 + 10
7p > 40
p > 40/7
p > 5,71
hp { 6, 7, 8}
d. 1/3(x+2)>2+3x/2 ....dikali 6
2(x+1) > 12 + 9x
2x + 2 > 12 + 9x
2x - 9x > 12-2
7x > 10
x > 10/7
x > 1,4
Hp {2,3,4...}
e. 1/3x+1 ≥ 1/2(x-1) .....dikali 6
2x + 6 ≥ 3(x-1)
2x + 6 ≥ 3x - 3
2x - 3x ≥ -3 - 6
-x ≥ -9
x ≥ 9
Hp { 9, 10, 11,....}
1/2t - 1 < 1/3t - 4/3
1/6t < -1/3
t < -1/3 : 1/6
t < -2
HP = { ..., -5, -4, -3 }
______________________
3/4y < 6
y < 6 : 3/4
y < 8
HP = { ..., 5, 6, 7 }
______________________
2/3 ( p - 1 ) > 1/5p + 2
2/3p - 2/3 > 1/5p + 2
7/15p > 2 2/3
p > 2 2/3 : 7/15
p > 5 5/7
HP = { 6, 7, 8, ... }
_______________________
1/3 ( x + 2 ) > 2 + 3x/2
1/3x + 2/3 > 2 + 3/2x
-1 1/6x > 1 1/3
x < -1 1/7
HP = { ..., -4, -3, -2 }
_______________________
1/3x + 1 ≥ 1/2 ( x - 1 )
1/3x + 1 ≥ 1/2x - 1/2
-1/6x ≥ -1 1/2
x ≥ 9
HP = { ..., 10, 11, 12 }