Question

Daca adun 5 nr consecutive impare, voi obtine 35.
Cel din mijloc este:
a)3 b)5 c)9 d)11
Toata rezolvarea va rog!!​

Answer 1

n+n+2+n+4+n+6+n+8=35

a) n+4=3

n=3-4

n=-1

b) n+4=5

n=5-4

n=1

c) n+4=9

n=9-4

n=5

d)n+4=11

n=11-4

n=7