相关试题
的平方根是±2，
的立方根是3，求
的平方根．
）（a+
．
股民王海上星期六买进某公司的股票3000股，每股17元，下表为本周内每日股票的涨跌情况（单位：元）
| 星期 |
一 |
二 |
三 |
四 |
五 |
六 |
| 每股涨跌 |
+4 |
+4．5 |
-1 |
-2．5 |
-6 |
+2 |
试问：
（1）本周内，每股的最高价是多少元？最低价是多少元？分别是星期几？
（2）以上星期六为0点，画出本周内股票价格涨跌情况的折线图．
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