Question

ex 14 va rog mult dau 20 puncte​

Answer 1

Explicație pas cu pas:

a)|123a :3 <=> 1+2+3+a:3 => 6+a :3 =>a€{0,3,6,9}=> 1230,1233,1236,1239

b)|63bc :10<=>c=0

|63bc:9 <=>6+3+b+c:9 => 9+b:9 => b€{0,9} => 6300 si 6390

c)|25ab :9 <=> 2+5+a+b :9 => 7+a+b:9 =>

a=2 si b=0=>2520

a=0 si b=2=>2502

a=3 si b=8=>2538

a=8 si b=3=>2583

a=9 si b=2=>2592

a=2 si b=9=>2529

a=5 si b=6=>2556

a=6 si b=5=>2565

a=7 si b=4=>2574

a=4 si b=7=>2547