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143题，求指导
Beginning in Junuary of last year, Carl made deposits of $120 into his account on the 15th of each month for several consecutive months and then made withdrawls of $50 from the account on the 15th of each of remaining months of last year. There were no other transactions in the account last year. If the closing balance of Carl'account for May of last year was $2600,what was the range of the monthly closing balances of Clar'S account last year?
1 A Last year the closing balance of Clar'S account for April was less than $2625
2 last year the closing balance of Clar's account for june was less than $2675
不容易啊，真心求解答，谢谢 |
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