Question

va rog ajutatima!!! am nevoie repede

Answer 1

ex.21      n:37=c    r       c=r⇒n=37c+c⇒n=38c   0≤c∠37
deci n∈{0,38*1,38*2.,38*3,.......,38*36}

ex.22
n:8=13  r∈{0,1,2,3,.....,7}
S=13*8+13*8+1+13*8+2+...........+13*8+7
S=13*8*8+(1+2+........+7)
S=832+28
s=862