Question

Va rog punctul E cerinte AUB A intersectat B A\B B\A Va rog este urgent.

Answer 1

rezolv pt primul A
(3x-7)/4<(8-x)/10
10(3x-7)<4(8-x)
30x-70<32-4x
30x+4x<32+70
34x<102
x<102/34
x<3
A={.......-4,-3,-2,-1,0,1,2}

(6x-5)/5≤(4x-1)/3
3(6x-5)≤5(4x-1)
18x-15≤20x-5
18x-20x≤15-5
-2x≤10
-x≤10/2
-x≤5                 inmultim -1
x≥-5
B={-5,-4,-3,-2,-1,0,1,2,3,4,............}
AUB={.......-5,-4,-3,-2,-1,0,1,2,3,4,...}
AintersectatB={-5,-4,-3,-2,-1,0,1,2}
A/B={.......-8,-7,-6}
B/A={3,4,5,6......}