总述：本次共解1题。其中
           ☆算术计算1题

〖1/1算式〗
    作业：求算式 -(500/1000)*log(2,500/1000)-(300/1000)*log(2,300/1000)-(200/1000)*log(2,200/1000) 的值.
    题型：数学计算
    解:
          -(500/1000)*log(2,500/1000)-(300/1000)*log(2,300/1000)-(200/1000)*log(2,200/1000)
        =-0.5*log(2,500/1000)-(300/1000)*log(2,300/1000)-(200/1000)*log(2,200/1000)
        =-0.5*(-1)-(300/1000)*log(2,300/1000)-(200/1000)*log(2,200/1000)
        =-0.5*(-1)-0.3*log(2,300/1000)-(200/1000)*log(2,200/1000)
        =-0.5*(-1)-0.3*(-1.736966)-(200/1000)*log(2,200/1000)
        =-0.5*(-1)-0.3*(-1.736966)-0.2*log(2,200/1000)
        =-0.5*(-1)-0.3*(-1.736966)-0.2*(-2.321928)
        =0.5-0.3*(-1.736966)-0.2*(-2.321928)
        =0.5-(-0.52109)-0.2*(-2.321928)
        =0.5--0.52109-(-0.464386)
        =1.02109-(-0.464386)
        =1.485476
    答案:-(500/1000)*log(2,500/1000)-(300/1000)*log(2,300/1000)-(200/1000)*log(2,200/1000)=1.485476

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