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 90/(1+6%)+90/(1+6%)^2+90/(1+6%)^3+90/(1+6%)^4+90/(1+6%)^5+1000/(1+6%)^5 的值.
    题型：数学计算
    解:
          90/(1+6%)+90/(1+6%)^2+90/(1+6%)^3+90/(1+6%)^4+90/(1+6%)^5+1000/(1+6%)^5
        =90/1.06+90/(1+6%)^2+90/(1+6%)^3+90/(1+6%)^4+90/(1+6%)^5+1000/(1+6%)^5
        =90/1.06+90/1.06^2+90/(1+6%)^3+90/(1+6%)^4+90/(1+6%)^5+1000/(1+6%)^5
        =90/1.06+90/1.06^2+90/1.06^3+90/(1+6%)^4+90/(1+6%)^5+1000/(1+6%)^5
        =90/1.06+90/1.06^2+90/1.06^3+90/1.06^4+90/(1+6%)^5+1000/(1+6%)^5
        =90/1.06+90/1.06^2+90/1.06^3+90/1.06^4+90/1.06^5+1000/(1+6%)^5
        =90/1.06+90/1.06^2+90/1.06^3+90/1.06^4+90/1.06^5+1000/1.06^5
        =90/1.06+90/1.1236+90/1.06^3+90/1.06^4+90/1.06^5+1000/1.06^5
        =90/1.06+90/1.1236+90/1.191016+90/1.06^4+90/1.06^5+1000/1.06^5
        =90/1.06+90/1.1236+90/1.191016+90/1.26247696+90/1.06^5+1000/1.06^5

        =90/1.06+90/1.1236+90/1.191016+90/1.26247696+90/1.3382255776+1000/1.06^5
        =90/1.06+90/1.1236+90/1.191016+90/1.26247696+90/1.3382255776+1000/1.3382255776
        =84.90566+90/1.1236+90/1.191016+90/1.26247696+90/1.3382255776+1000/1.3382255776
        =84.90566+80.09968+90/1.191016+90/1.26247696+90/1.3382255776+1000/1.3382255776
        =84.90566+80.09968+75.565735+90/1.26247696+90/1.3382255776+1000/1.3382255776
        =84.90566+80.09968+75.565735+71.28843+90/1.3382255776+1000/1.3382255776
        =84.90566+80.09968+75.565735+71.28843+67.253236+1000/1.3382255776
        =84.90566+80.09968+75.565735+71.28843+67.253236+747.258173
        =165.00534+75.565735+71.28843+67.253236+747.258173
        =240.571075+71.28843+67.253236+747.258173
        =311.859505+67.253236+747.258173
        =379.112741+747.258173
        =1126.370914
    答案:90/(1+6%)+90/(1+6%)^2+90/(1+6%)^3+90/(1+6%)^4+90/(1+6%)^5+1000/(1+6%)^5=1126.370914

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