求 2^199+2^198+2^197+.2^2+2+1
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求 2^199+2^198+2^197+.2^2+2+1
求 2^199+2^198+2^197+.2^2+2+1
求 2^199+2^198+2^197+.2^2+2+1
2^199+2^198+2^197+.2^2+2+1
=1+2+2^2+...+2^197+2^198+2^199
=1*(1-2^199)/(1-2)
=2^199-1
=2^(199+198+.....+2+1)
=2^(199+1)*100
=2^20000
2^199+2^198+2^197+......2^2+2+1
=2^(199+198+.....+2+1)
=2^(199+1)^100
=40000