Question

alguem me ajuda pfvr



Represente na reta numérica os intervalos reais. Usando as bolinhas aberta ou fechada nas extremidades, conforme

visto no vídeo.

______________________________________________________________________


a) ] – 1 , 5 ] _______________________________________________________________________

b) [ 2, 8 ] _______________________________________________________________________

c) ] – 5, 0 [ _______________________________________________________________________

d) [ – 2 , 6 ] ________________________________________________________________________

e) ] – ∞, – 3] _______________________________________________________________________

f) ] 1, + ∞ [ _______________________________________________________________________

g) ] – ∞, 5 [ _____________________________________________________________________

h) [ – 1, + ∞ [ ______________________________________________________________________

i) { x  R / – 3 < x ≤ 1 }

_____________________________________________________________________

j) { x  R / – 5 ≤ x ≤ – 2 }

______________________________________________________________________

k) { x  R / – 1 < x < 6 }

_______________________________________________________________________

l) { x  R / – 5 ≤ x < 0}

________________________________________________________________________

m) { x  R / x < – 3 }

________________________________________________________________________

n) { x  R / x > 2 }

________________________________________________________________________

o) { x  R / x ≤ 4 }

_______________________________________________________________________

p) { x  R / x ≥ – 2 }

________________________________________________________________________

Answer 1

Resposta:

a) ] – 1 , 5 ] ____________-1___________5_________________________________

b) [ 2, 8 ] _____________2_________________8_______________________

c) ] – 5, 0 [ ___________-5_______0_____________________________________

d) [ – 2 , 6 ] _______________-2__________6______________________________

e) ] – ∞, – 3]  -∞_____________________________3__________________________

f) ] 1, + ∞ [ ______________1________________________ + ∞

g) ] – ∞, 5 [ + -∞_____________5__________________________________________

h) [ – 1, + ∞ [ ____________-1_____________________________+ ∞

i) { x  R / – 3 < x ≤ 1 }

_________-3___________1___________________________________

j) { x  R / – 5 ≤ x ≤ – 2 }

__________-5_______-2_____________________________________

k) { x  R / – 1 < x < 6 }

__________-1___________6__________________________________

l) { x  R / – 5 ≤ x < 0}

_________-5__________0____________________________________

m) { x  R / x < – 3 }

____________________-3_____________________________________

n) { x  R / x > 2 }

_____________________________2______________

o) { x  R / x ≤ 4 }

_______________________4_________________________________

p) { x  R / x ≥ – 2 }

_________________-2______________________________

Explicação passo-a-passo:

Os número em negrito são bolinhas fechadas, e os não negritos bolinhas abertas. Os traços em negrito quer dizer o intervalo em que se encontram compreendido os números extremos.