Question

determinați numerele a,d,c,stind ca a 《b《c stind ca 9×a+9×b+9×c=72​

Answer 1

a<b<c

9•a+9•b+9•c=72

9(a+b+c)=72

a+b+c=8

a=0=> b+c=8

=> a+b+c=0+1+7=0+2+6=0+3+5

a=1 => b+c=7

a+b+c=1+2+5=8

a+b+c=1+3+4=8

(a;b;c)∈{ (0;1;7); (0;2;6); (0;3;5); (1;2;5); (1,3,4)}