[交流] 【求助】求解带积分的方程 已有5人参与

Originally posted by lijinfeng042 at 2010-06-03 13:52:01:
R2007的话 积不出只有数值积分了 代入y值 积分 得到n 作图 呵呵 在写 试试数值的命令 不行在写数值算法

Originally posted by haoshihuang at 2010-06-02 14:05:07:
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Originally posted by lijinfeng042 at 2010-06-02 15:10:24:

计算的话
solve(n=ln(exp(y-1)+1)+int(x^0.5/(1+exp(x-y)), x=0..10))
n代人值即可
比如
solve(1=ln(exp(y-1)+1)+int(x^0.5/(1+exp(x-y)), x=0..10))
结果
{[y = 0.01088773136]}
有一些列的点再拟合看看

Originally posted by haoshihuang at 2010-06-02 16:00:05:



不行啊！！
>> solve(1=ln(exp(y-1)+1)+int(x.^0.5/(1+exp(x-y)),x=0..10))
??? solve(1=ln(exp(y-1)+1)+int(x.^0.5/(1+exp(x-y)),x=0..10))
           |
Error: The expression to the left of ...