Question

AYUDA PLSS
Write in interval from the numbers that verify the inequality in each case:


a) 3 ≤ x +1 < 3


b) 1 ≤ x 4 ≤ 7


c) 0 ≤ x 5 < 2


d) 5 < 2x 1 ≤ 9

Answer 1

Respuesta:

a). X∈ [2;2[

b). X ∈ [1/4;7/4]  

c). X∈[0;2/5[

d). X ∈ ]5/2;9/2]

Explicación paso a paso:

a) 3 ≤ x +1 < 3

3-1≤X+1-1<3-1

2≤X<2

X∈[2;2[

b) 1 ≤ x 4 ≤ 7

1/4≤X 4/4≤7/4

1/4≤X≤7/4

X ∈[1/4;7/4]

c) 0 ≤ x 5 < 2

0/5≤X5/5<2/5

0≤X<2/5

X∈[0;2/5[

d) 5 < 2x 1 ≤ 9

5/2<X 2/2≤9/2

5/2<X≤9/2

X ∈ ]5/2;9/2]