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Determina restul impartirii numarului n=1x2x3x....x20+21 la 6.Dau coroana

Răspuns :

n=1x2x3x....x20+21=1x2x3x....x20+6x3+3
n=6(1x2x3x4x5x7x...x20+3)+3=>
n:6=1x2x3x4x5x7x...x20+3 rest 3.
N =1*2*3*........*20+21⇒ 1*2*3*..........*20+6*3+3⇒ N=6*(1*2*3*4*5*7*8*..........*20+3)+3⇒ N:6=1*2*3*4*5*7*8*..........*20+3 rest 3. Sper ca te-am ajutat!!!!!!!!!