为什么B不对？AR=ΔTR/Q，ΔTR增长了10%，那么AR也是增长了10%
问题如下图：
选项：
A. 
B. 
C. 
解释：
NO.PZ2016010802000040 问题如下 agriculturfirm operating in a perfectly competitive market supplies wheto manufacturers of consumer fooprocts ananimfee. If the firm were able to expanits proction anunit sales 10% the most likely result woulbe: A.a 10% increase in totrevenue. B.a 10% increase in average revenue. C.increase in totrevenue of less th10%. A is correct.In a perfectly competitive market, increase in supply a single firm will not affeprice. Therefore, increase in units solthe firm will matcheproportionately increase in revenue.考点完全竞争市场下厂商的总收入解析在完全竞争的市场条件下，P=MR虽然题目中的厂商把单位售价提高10%，但是农场品市场是完全竞争市场，厂家只是价格的被动接受者。最后该厂商只能以原来价格卖出产品。但是产量增加了10%,所以总收入增加了10%。B,C说法都不对。 我在A，C里面纠结了很久，最后选的C
NO.PZ2016010802000040问题如下agriculturfirm operating in a perfectly competitive market supplies wheto manufacturers of consumer fooprocts ananimfee. If the firm were able to expanits proction anunit sales 10% the most likely result woulbe:A.a 10% increase in totrevenue.B.a 10% increase in average revenue.C.increase in totrevenue of less th10%.A is correct.In a perfectly competitive market, increase in supply a single firm will not affeprice. Therefore, increase in units solthe firm will matcheproportionately increase in revenue.考点完全竞争市场下厂商的总收入解析在完全竞争的市场条件下，P=MR虽然题目中的厂商把单位售价提高10%，但是农场品市场是完全竞争市场，厂家只是价格的被动接受者。最后该厂商只能以原来价格卖出产品。但是产量增加了10%,所以总收入增加了10%。B,C说法都不对。既然是完全竞争市场，提价卖不出去，那总收入就增加不了，答案的意思就像自己脑补了一下，商家知难而退，原价卖出了。考试是要这样思考嘛？
NO.PZ2016010802000040 a 10% increase in average revenue. increase in totrevenue of less th10%. A is correct. In a perfectly competitive market, increase in supply a single firm will not affeprice. Therefore, increase in units solthe firm will matcheproportionately increase in revenue. 考点完全竞争市场下厂商的总收入 解析在完全竞争的市场条件下，P=MR 虽然题目中的厂商把单位售价提高10%，但是农场品市场是完全竞争市场，厂家只是价格的被动接受者。最后该厂商只能以原来价格卖出产品。但是产量增加了10%,所以总收入增加了10%。B,C说法都不对。 请问P=MR是怎么看出来的？
NO.PZ2016010802000040 题干这句话是说，If the firm were able to expanits proction anunit sales 10%，意思是“如果公司能够将其产量和单位销售量扩大 10% ”，问题①那不就是说Q增加10%吗？那里说价格提高了？问题②因为TR等于P乘Q，Q扩大，所以TR涨10%。可以这么理解吗？
NO.PZ2016010802000040 a 10% increase in average revenue. increase in totrevenue of less th10%. A is correct. In a perfectly competitive market, increase in supply a single firm will not affeprice. Therefore, increase in units solthe firm will matcheproportionately increase in revenue. 考点完全竞争市场下厂商的总收入 解析在完全竞争的市场条件下，P=MR 虽然题目中的厂商把单位售价提高10%，但是农场品市场是完全竞争市场，厂家只是价格的被动接受者。最后该厂商只能以原来价格卖出产品。但是产量增加了10%,所以总收入增加了10%。B,C说法都不对。什么时候用边际产量递减？
