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〖1/1算式〗
    作业：求算式 -650000+320000/1.15+320000/((1.15)^2)+230000/((1.15)^3)+175000/((1.15)^4)+120000/((1.15)^5) 的值.
    题型：数学计算
    解:
          -650000+320000/1.15+320000/((1.15)^2)+230000/((1.15)^3)+175000/((1.15)^4)+120000/((1.15)^5)
        =-650000+320000/1.15+320000/(1.15^2)+230000/((1.15)^3)+175000/((1.15)^4)+120000/((1.15)^5)
        =-650000+320000/1.15+320000/1.3225+230000/((1.15)^3)+175000/((1.15)^4)+120000/((1.15)^5)
        =-650000+320000/1.15+320000/1.3225+230000/(1.15^3)+175000/((1.15)^4)+120000/((1.15)^5)
        =-650000+320000/1.15+320000/1.3225+230000/1.520875+175000/((1.15)^4)+120000/((1.15)^5)
        =-650000+320000/1.15+320000/1.3225+230000/1.520875+175000/(1.15^4)+120000/((1.15)^5)
        =-650000+320000/1.15+320000/1.3225+230000/1.520875+175000/1.749006249999999+120000/((1.15)^5)
        =-650000+320000/1.15+320000/1.3225+230000/1.520875+175000/1.749006249999999+120000/(1.15^5)
        =-650000+320000/1.15+320000/1.3225+230000/1.520875+175000/1.749006249999999+120000/2.011357187499999
        =-650000+278260.869565+320000/1.3225+230000/1.520875+175000/1.749006249999999+120000/2.011357187499999
        =-650000+278260.869565+241965.973535+230000/1.520875+175000/1.749006249999999+120000/2.011357187499999
        =-650000+278260.869565+241965.973535+151228.733459+175000/1.749006249999999+120000/2.011357187499999
        =-650000+278260.869565+241965.973535+151228.733459+100056.817979+120000/2.011357187499999
        =-650000+278260.869565+241965.973535+151228.733459+100056.817979+59661.208236
        =-371739.130435+241965.973535+151228.733459+100056.817979+59661.208236
        =-129773.1569+151228.733459+100056.817979+59661.208236
        =21455.576559+100056.817979+59661.208236
        =121512.394538+59661.208236
        =181173.602774
    答案:-650000+320000/1.15+320000/((1.15)^2)+230000/((1.15)^3)+175000/((1.15)^4)+120000/((1.15)^5)=181173.602774

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