设s=-2-2^2-2^3-2^4-2^5-2^6-2^7-2^8-2^9+2^102s=-2^2-2^3-2^4-2^5-2^6-2^7-2^8-2^9-2^10+2^112s-s=2^11-2^10-2^10+2s=2^11-2^11+2s=2即-2-2^2-2^3-2^4-2^5-2^6-2^7-2^8-2^9+2^10=2