nancy5130

与楼上的有同样疑问。这个RANGE看了半天还是不晓得说的是啥。
解释说：given both (1)and (2), it follows from the remarks above that Carl began making $50 withdrawals on june 15.Therefore, the change to C's account balance for each month of last year are known. Since the closing balance for May is given, it follows that the closing balances for each month of last year are known, and hence the range of thease 12 known values can be determined.
黄色部分不是很清楚，希望哪位XDJM能瞅一眼，答疑解惑~！谢谢了！！