Question

Ultima cifra a n=1+2^0+2^1+2^2+2^3+2^4+...+2^2012 este: a. 8 b. 6 c. 4 d. 2

Answer 1

n-1=2^0+2^1+...+2^2012
2(n-+)=2^1+2^2+...+2^2012+2^2013
*le scadem*
n-1=2^2013-2^0
n-1=2^2013-1
n=2^2013
ulrima cifra=(2^4)^503+2^1=(...6)^503+...2=...6+...2=...8

raspunsul corect este a.8

Sper ca te am ajutat!:)

Answer 2

răspunsul corect este 8.
succes.