设收费标准定为X元,则
[20+10(4600-X)/100]*(X-3200)=64000
(20+460-0.1X)(X-3200)=64000
(4800-X)(X-3200)=640000
X^2+8000X+16000000=0
(X-4000)^2=0
X=4000
定价为4000元,可获利润64000元
2) 若要大于64000元,则
(4800-X)(X-3200)>64000
-X^2+8000-16000000>0
(X-4000)^2
设收费标准定为X元,则
[20+10(4600-X)/100]*(X-3200)=64000
(20+460-0.1X)(X-3200)=64000
(4800-X)(X-3200)=640000
X^2+8000X+16000000=0
(X-4000)^2=0
X=4000
定价为4000元,可获利润64000元
2) 若要大于64000元,则
(4800-X)(X-3200)>64000
-X^2+8000-16000000>0
(X-4000)^2