Question

Determinati multimile:a)A={x∈ N/x divizibil 20 si x≤100};
b)B={x∈N/x divizibil 2,x divizibil 3 si x < 20};
c)C={x∈N/15 divide x si x <40};
d)D={x∈N/x divizibil 7 si x divide 56};
e)E={x∈N/x divizibil 30 si x are doua cifre};
f)F={x∈N/ x divizibil 17 si x are doua cifre};
g)G={x∈N/x∈M50 si x∈D200};
h)H={x∈N/11 divide x si 79 i)I={x∈N/x divizibil 52 si 20 j)J={x∈N/x divizibil 2 si x divizibil 3 si x ≤ 50};
k)K={x∈N/x divizibil 2 sau x divizibil 5 si x ≤ 20};
l)L={x∈N/x divizibil 3 sau x divizibil 5 si 20 < x < 50};
m)M={x∈N/x divizibil 3 si x divizibil 6 si x < 25};
n)N={x∈N/x divizibil 5 si x divizibil 10 si x ≤ 30}.
Va rog frumos!

Answer 1

a) A={20;40;60;80;100}
b) B={2,4,6,8....20;3,6,9,12,15,18}
c) C={15;30}
d) D={7;14;21;28;35;42;49;56}
e) E={15;30}
f) F={17}
g) G=??????
h) H={11;22;33;44;55;66;77;79}
i) I={20;40;52} j) J={2,4,6,8,10,...50;3,6,9,12,15....48}
k) K={2,4,6,8,..20; 5,10,15,20}
l) L={21,24,27,30...49; 25,30,35,40,45}
m) M={3,6,9,12,15,18,21,24; 6,12,18,24}
n) N={5,10,15,20,25,30; 10,20,30}

Coroană? :)