100 3、41,2) P 2(0,0 P 1002268576 3m 0 576243252 3(0,0) 4.69 1(0,0) 4m 22.685.76 5.7624.32P 4m 3m 3 1 2 1(0,0) 2(0,0) 3(0,0) 4(1,2)         = 0 100 P         = 5.76 24.32 22.68 5.76 k             =       2 1 5.76 24.32 22.68 5.76 0 100         − =       1.11 4.69 2 1  