Question

26 de puncte pentru cine rezolva exercitiul 4 si 5.

Answer 1

$4)~a)~-11+3x \leq 1 \\3x \leq 1+11 \\ 3x \leq 12 \\ x \leq 4$
x∈{.... -1, 0, 1, 2, 3, 4}


$b)~7-2x\ \textless \ 11 \\ 2x\ \textgreater \ -4 \\ x\ \textgreater \ -2$
x∈{-1;0;1;2....}


$c)~3x+5 \geq -2x+10 \\ 3x+2x \geq 10-5 \\ 5x \geq 5 \\ x \geq 1$
x∈{1,2,3,4....}


La d) nu cred ca se vede tot exercitiul.


$5)~a)~2x-3\ \textless \ -5 \\ 2x\ \textless \ -2 \\ x\ \textless \ -1$
x∈{....-3,-2}



$b)~3x+5 \geq -7 \\ 3x \geq -12 \\ x \geq -4$
x∈{-4,-3,-2,-1.....}


$c)~7x-3\ \textless \ 5x-11 \\ 2x\ \textless \ -8 \\ x\ \textless \ -4$
x∈{...-6.-5}