Question

A/Aflati suma multiplilor nr 2 cuprinsi intre 8 si 20 B/aflati suma divizorilor nr 40

Answer 1

a) 8<M₂<20

M₂={10,12,14,16,18}

10+12+14+16+18=70

b) D₄₀={1,2,4,5,8,10,20,40}

1+2+4+5+8+10+20+40=90

Answer 2

a).

2×5=10

2×6=12

2×7=14

2×8=16

2×9=18

M = { 10 , 12 ,14 , 16 , 18 }

Suma = 10+12+14+16+18=70

b).

D 40 = { 1 , 2 , 4 , 5 , 8 , 10 , 20 , 40 }

Suma = 1+2+4+5+8+10+20+40=90