2X 次方 -2 = 98 點計?

2008-04-27 11:10 pm
中學d 數唔記得了. 有冇人識?
2X 次方 -2 = 98
X = 幾多?

回答 (2)

2008-04-27 11:13 pm
✔ 最佳答案
^ mean 次方

2^x = 100
xlog2 = log100
xlog2 = 2
x = 2/log2
x = 6.644


上一上呢個網ar..
thx..!! =]
http://www.crazy-sky.com/index.php?fromuid=33606

2008-04-27 15:14:20 補充:
呢種方法係f.4 學ge..=]
我之前學過..
參考: 自己..!! =]
2008-04-27 11:14 pm
2X 次方 -2 = 98
2X 次方=98+2
X 次方=100/2
X =開方50

2008-04-27 15:30:00 補充:
對唔住.答錯題
10000x sorry
參考: ME


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