Question

Suma a sapte numere naturale impare este 147.Aflati numerele.

Answer 1

a+b+c+d+e+f+g=147;
⇒a+a+2+a+4+a+6+a+8+a+10+a+12=147
⇒7a+42=147⇒7a=105
⇒a=15;
⇒b=17;
⇒c=19;
⇒d=21;
⇒e=23;
⇒f=25;
⇒g=27;

Answer 2

numerele de consecutive pare sau impare au diferenta 2
a+b+c+d+e+f+g=147
b=a+2
c=b+2=a+4
d=c+2=b+4=a+6
e=d+2=c+4=b+6=a+8
f=e+2=d+4=c+6=b+8=a+10
g=f+2=e+4=d+6=c+8=b+10=a+12
a+a+2+a+4+a+6++a+8+a+10+a+12=147
7a+42=147
7a=147-42
7a=105
a=105/7
a=15
b=a+2=15+2=17
c=b+2=17+2=19
d=c+2=19+2=21
e=d+2=21+2=23
f=e+2=23+2=25
g=f+2=25+2=27