Question

doua numere care are suma cifrelor  este  5 reprezentati prin multimea M aflati card M

Answer 1

x+y=5 M1=1.2.3.4.5 M2=1.2.3 4.5 Exemplu : 3+2=5 Cred ca asa

Answer 2

x+y=5
M={x,y ∈ N|x+y=5}⇒x∈{0,1,2,3,4,5}
y∈{0,1,2,3,4,5}
cardM=5