Question

efectuati ( 11 + 11 ori 2 + ... + 11 ori 2 ^ 9 ) : 1023

Answer 1

(11+11x2+11x2^2+11x2^3+11x2^4+11x2^5+11x2^6+11x2^7+11x2^8+11x2^9 ):1023= 11x (2+2^2+2^3+2^4+2^5+2^6+2^7+2^8+2^9) :1023= 11x1023:1023= 11