Question

me ajudem nessa tarefa .

Answer 1

1º) a)A={0,1,2,3,4)
b)B={5,6,7,8,9}
c)C={2,4,6,8,10,....}
d)D={11,26,47,74}

2º)a) y = 2² +2.2.1+ 1²
y=4+4+1
y=9

b)y=(2-1)²+2³+1³
y=1²+8+1
y=10

3 º) 5.8 - 3.7+8.7 =
40 -21 + 56 = 
75

4º)
a) 3x - 9 = 0
3x = 9
x = 9/3
x = 3

b)4x - 4 = 16
4x = 16+4
4x = 20
x = 20/4
x = 5

c) 2x-15 = 0
2x = 15
x = 15/2
x = 7,5

d)(x - x/2)/3 = 1
(x-x/2) = 1*3
x(1-1/2)=3
1/2x = 3
x = 6