Răspuns :
a+(a+1)+(a+2)=201
3a=201-3
3a=198
a=66
a+1=67
a+2=68
deci numerele sunt 66, 67 si 68
2.
x∈Z/
x+14<31
x < 31-14
x < 17
x = {.... - 2 ; - 1; 0; 1; 2; ... ; 16 } ∈ Z
1)...
a + a+1 + a+2 = 201
3a+3 = 201
a = (201-3):3 = 66 => R: 66;67 si 68
2)... x ∈ Z / x + 14 <31
x < 31-14
x < 17 R: x={.... -2 ; -1; 0; 1; 2; ... ; 16} ⊂ Z
a + a+1 + a+2 = 201
3a+3 = 201
a = (201-3):3 = 66 => R: 66;67 si 68
2)... x ∈ Z / x + 14 <31
x < 31-14
x < 17 R: x={.... -2 ; -1; 0; 1; 2; ... ; 16} ⊂ Z