Question

Exercițiul 5 urgent plssssss

Answer 1

Răspuns:

l2x-3l≤5
2x≤5+3

2x≤8

x≤4=>

A={-4,-3,-2,-1,0.1,2,3,4}
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(x-2)/(x+2)∈Z

Oservi      ca        fractia       e         subunitara=>

(x-2)/(x+2)=±1,sau0

(x-2)/(x+2)=   -1

x-2=-x-2

x= -x   =>       x=0

x-2)/(x+2)=1

x-2=x+2

2= -2     egalitate  imposibila

x-2)/(x+2)=0=>x=2
DEci    B={0,2}

A\B={-4,-3,....0.1,2,3,4}\{0,2}=
{-4,-3,-1,1,3,4}

A∩B={-4,-3,-2,-1,0,1,2,3,4}∩{0,2}={0,2}

Explicație pas cu pas: