Question

1.aflati numarul ab(cu bara deasupra),in cazul in care ab+b=14
2.determina numerele naturale a si b,nenule,stiind ca a-b=2 si a+b=24.Calculeaza MA a numerelor a si b gasite.

Answer 1

1..ab+b=14

ab=14-b

a=1; b=2

2.a+b=24

b=2

a+2=24

a=24-2

a=22

Answer 2

1. ab+b=14=>b(a+1)=14=>b=14 sau a+1=14=>a=13

ab=1314

2.a-b=2

 a+b=24

_________ (-)

-2b=-22=>b=11

a=24-11=13

ma=(11+13)/2=24/2=12