[計量] pp兩道數學問題急問~
1. [√(9+√80)+√(9-√80)]的計算.....
我怎摸算都算不出阿...........
答案好像是20.....prep模考完後按掉了現在有點忘了><
√80是在第一個√裡面再開一次庚號喔.....
2.of the 200 members, ezch member who speak German also speak English,
70 of member speak only Spanish, no member speaks all three languages.
How many members speak two of the three language?
條件一 60 of members speak only Englsh
條件二 20 of members do not speak any
答案是C
但是總合後要怎麼算出來呢?????
麻煩各位了~~~~~~~~明天就要考了我的天阿...............><
也祝福明天就要考的人們都考到心目中理想的分數阿~~~~~~~~~
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