Question

Ajutoooor!
Dau coroana.​

Answer 1

Răspuns:

a) -4 < x <_ 3 € N

x€ {0,1,2,3}

b) -4 < x <_ 3 € Z

x€{-3, -2, -1, 0, 1, 2, 3}

c) nu am invatat cu R

e) |x| <_ 5

|x| = { 5, 4, 3, 2, 1,0}

Answer 2

Răspuns:

Explicație pas cu pas:

a)

A = {0, 1, 2, 3}

b)

B = {-3, -2, -1, 0, 1, 2, 3}

c)

C = (-4, 3]

d)

-4 < 2x - 1 < 4

-3 < 2x < 5

-3/2 < x < 5/2

D = (-3/2, 5/2)

e)

-5 ≤ x ≤ 5

E = {0, 1, 2, 3, 4, 5}

f)

-10 ≤ 3x - 8 ≤ 10

-2 ≤ 3x ≤ 18

-2/3 ≤ x ≤ 6

F = {0, 1, 2, 3, 4, 5, 6}

g)

G = (-∞, 10] U [10, +∞)

h)

-2 ≤ 3x + 8 ≤ 16

-10 ≤ 3x ≤ 8

-10/3 ≤ x ≤ 8/3

H = {0, 1, 2}

i)

-9 ≤ 4x - 5 < 15

-4 ≤ 4x < 20

-1 ≤ x < 5

I = {-1, 0, 1, 2, 3, 4}

j)

-30 ≤ 4x - 1 ≤ 30

-29 ≤ 4x ≤ 31

-29/4 ≤ x ≤ 31/4

J = [-29/4, 31/4]