Given e^x + e^-x =20, find e^2x - e^-2x
explain in clear steps please
maths e
2010-10-30 6:24 am
回答 (2)
2010-10-30 6:36 am
✔ 最佳答案
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2010-10-29 22:36:50 補充：
http://img816.imageshack.us/img816/9321/58828930.png
2010-10-30 00:03:28 補充：
Yes, e^x - e^-x should be +/-6sqrt(11)
So e^2x - e^-2x is +/- 120 sqrt(11)
2010-10-30 6:59 am
自由自在( 知識長 ) :
- 120√11 is another answer or not ?
- 120√11 is another answer or not ?
收錄日期: 2021-04-21 22:19:17
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