求2的多少次方等于 909656889
方法如下:
1 | In[11]:= Solve[2^x == 909656889, x] |
2 |
3 | Out[11]= {{x -> |
4 | ConditionalExpression[(2 I \[Pi] C[1])/Log[2] + Log[909656889]/ |
5 | Log[2], C[1] \[Element] Integers]}} |
以数字形式(29.7607即为结果):
1 | In[14]:= N[Solve[2^x == 909656889, x], 6] |
2 |
3 | Out[14]= {{x -> |
4 | ConditionalExpression[<strong>29.7607</strong> + 9.06472 I C[1], |
5 | C[1] \[Element] Integers]}} |
参考资料:
http://wenku.baidu.com/link?url=iMM_BINdXNH84JhlTIrGV3p9v-n4BbNR7nnigSUm5o4xYR7yHCev9uYXKQpOjBQCZwO3QC8E32NeteblaTFJUZ-vGQaQQoGOBNuquWP5dGe