- 2024-05-09不想不想澪
9 =14400x+259200 (4分)(2)令(36+2x)0.5%=1250+450 =1700(元) (8分)P=1250+[90000-(n-1)•.5% =1250+450-6.25(n-1) =1700-6解.25(n-1)=-6.25n+1706;1250] ×0.9=32+2x x=2 (6分)(3)90000÷(6×12)=1250元 1250+90000×0:(1)y1=(18+12+ =(32+2x)×8000 =16000x+256000 (2分) y2=(18+12+6+2x)8000×90% =(36+2x)×8000×0
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