Răspunsuri

2014-11-03T19:27:18+02:00
8+16+...+344=8(1+2+3+..+43)=8(43 x 44)/2=4(43 x 44)=7568
4+8+...+172=4(1+2+3+...43)=4(43 x 44)/2=2(43 x 44)=3784
8+16+...+344/4+8+....+172=7568/3784=2

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