Question

u.c (2006ⁿ+2010ⁿ±¹+2005ⁿ±²)

Answer 1

ultima cifra a lui 2006^n  este 6
ultima cifra a lui 2010^n+1  este 0
ultima cifra a lui 2005^n+2  este 5
ultima cifra a lui 2006^n+ 2010^(n+1)+2005^(n+2) este 6+0+5=11  deci 1