Ti-am facut toata tema in jumatate de ora :)
b)x+3<11, x<11-3
x<8
x={0, 1, 2, 3, 4, 5, 6, 7}
c)x-7<13
x<20
x={0, 1, 2, ... 19}
d)x-3<6
x<9
x={0, 1, 2, ... 8}
e)4+x ≤ 10
x<= 6
x={0, 1, 2, ... 6}
f)2+x ≤ 12
x<=10
x={0, 1, 2, ... 10}
g) x+17>23
x>6
x={7, 8, ... +inf}
h)x+21 ≥ 43
x>=22
x={22, 23, ... +inf}
i)4•x<24
x<6
x={0, 1, 2, ... 5}
j)3•x ≤ 33
x<=11
x={0, 1, 2, ... 11}
k)x:2<7
x<14
x={0, 2, 4, .. 12}
l)x:4 ≤ 2
x<=8
x={0, 4, 8}
m)x:3<5
x<15
x={0, 3, 5, 15}
n)x:6 ≤ 4
x<=24
x={0, 6, 12, 18, 24}
o)3•x+11<44
3*x<33
x<11
x={0, 1, 2, ... 10}
p)3+7•x ≤ 52
7*x<=49
x<=7
x={0, 1, 2, ... 7}
r)5•x-23 ≥ 22
5*x>=45
x>=9
x={0, 1, 2, ... 9}
s)6•x-18 ≥ 72
6*x>=90
x>=15
x={15, 16, ... +inf}
t)3 la puterea x ≤ 81
3^x <= 3^4
x<=4
x={0, 1, 2, 3, 4}
u)10 la puterea x< 100.000
10^x < 10^5
x<5
x={0, 1, 2, 3, 4}
v)2 la puterea 2•x+1 ≥128
2^(2*x+1)>2^(7)
2*x+1 > 7
2*x > 6
x>3
x={4, 5, +inf}
x)4 la puterea 3•x-5>256
4^(3*x-5) > 4^4
3*x-5 > 4
3*x > 9
x>3
x={4, 5, ... +inf}
