Question

sa se scrie sub forma de interval


ajutorrr repede dua coroana

Answer 1

4)

a)(5;7)

b)(-3;2]

c)[-10;8]

d)[3;100)

e)[0,5;+infinit)

f)(-infinit;-✓3)

EXPLICATII

$cand \: avem \: \leqslant sau \geqslant \\ foloim \: paranteze \: patrate$ [ ]

$cand \: avem \: < > folosim \: \\ paranteze \: rotunde$( )

pentru + infinit și - infinit folosim mereu paranteze rotunde. ( )

Answer 2

Răspuns:

Explicație pas cu pas:

$\bf a)~~5<x<7\implies \orange{\underline{x\in \big(5;~7\big)}}$

$\bf b)~~-3<x\leq 2\implies \green{\underline{x\in \big(-3;2\big]~}}$

$\bf c)~~-10\leq x\leq 8\implies \purple{\underline{x\in \big[-10;~8\big]}}$

$\bf d)~~3\leq x<100\implies \pink{\underline{x\in \big[3;~100\big)}}$

$\bf e)~~0,5\leq x\implies \blue{\underline{x\in \big[0,5;+\infty \big)}}$

$\bf f)~~ x<-\sqrt{3} \implies \red{\underline{x\in \big(-\infty;~-\sqrt{3} \big)}}$