Question

Determina toate numerele de forma 8ab3,stiind ca a-b=3

Answer 1

8ab3 
a,b apartin de la [0,9], fiind nr reale (apartine lui N)

a-b=3 ==> a=b+3

b=0 ==> a=0+3=3
b=1 ==> a=1+3=4
b=2 ==> a=2+3=5
b=3 ==> a=3+3=6
b=4 ==> a=4+3=7
b=5 ==> a=5+3=8
b=6 ==> a=6+3=9

}=>8303 , 8413 , 8523, 8633, 8743, 8853, 8963