Question

determinati elementele multimii {x e N I(x+2)se divide5,x=ab (ab nr)

Answer 1

A={ x E N I (x+2)  divide 5, x=ab}
x+2=15
x=15-2
x=13
x+2=20
x=20-2
x=18
x+2=25
x=25-2
x=23
x+2=30
x=30-2
x=28
x+2=35
x=35-2
x=33
x+2=40
x=40-2
x=38
x+2=45
x=45-2
x=43
x+2=50
x=50-2
x=48
x+2=55
x=55-2
x=53
x+2=60
x=60-2
x=58
x+2=65
x=65-2
x=63
x+2=70
x=70-2
x=68
x+2=75
x=75-2
x=73
x+2=80
x=80-2
x=78
x+2=85
x=85-2
x=83
x+2=90
x=90-2
x=88
x+2=95
x=95-2
x=93
x+2=100
x=100-2
x=98
A={13,18,23,28,33,38,43,48,53,58,63,68,73,78,83,88,93,98}