Question

calculați calculele...​

Answer 1

Răspuns:

3×[2×|2x-5|-15]-12=9

3×[2×|2x-5|-12≤9

3×[2×|2x-5|-15]≤9+12

2×|2x-5|-15]≤21

2×|2x-5|-15]≤21/3

2×|2x-5|-15]≤7

2×|2x-5|≤7+15

2×|2x-5|≤22

|2x-5|≤22/2

|2x-5|≤11=>

-11≤2x-5≤11 | (+5)=>

-6≤2x≤16|(:3) =>

-3≤x≤8

x €{-3,-2,-1,0,1,2,3,4,5,6,7,8}=>. X

e numar intreg ce apartine lui Z