Question

determinati nr naturale de forma ab cu bara deasupra pt care ab cu bara deasupra =4x(a+b)

Answer 1

ab =4•(a+b)

10a+b=4a+4b

10a-4a=4b-b

6a=3b  => 2a=b

a=1 si b=2 => ab=12

a=2 si b=4 => 24

a=3 si b=6 => ab=36

a=4 si b=8 => ab=48

ab∈{12, 24, 36, 48}