数学基础太差了 麻烦大侠做下 [ Last edited by bohdshen on 2010-5-9 at 16:22 ] 返回小木虫查看更多
兄弟我告你吧，先把底当作已知数，指当做未知数求导;再把底当做未知数，指为已知数求导，最后把两次求的结果相加！
用matlab帮你算了一下，结果如下： f'(x)=A*(3/((x - 1)*(1 - x)^(3/(x - 1) + 1)) + (3*log(1 - x))/((x - 1)^2*(1 - x)^(3/(x - 1)))) - (B*(1/(1 - x)^(3/(x - 1)) - 1)^2)/x^2 + (2*B*(1/(1 - x)^(3/(x - 1)) - 1)*(3/((x - 1)*(1 - x)^(3/(x - 1) + 1)) + (3*log(1 - x))/((x - 1)^2*(1 - x)^(3/(x - 1)))))/x [ Last edited by shp011222 on 2010-5-9 at 20:39 ]，
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兄弟我告你吧，先把底当作已知数，指当做未知数求导;再把底当做未知数，指为已知数求导，最后把两次求的结果相加！
用matlab帮你算了一下，结果如下：
f'(x)=A*(3/((x - 1)*(1 - x)^(3/(x - 1) + 1)) + (3*log(1 - x))/((x - 1)^2*(1 - x)^(3/(x - 1)))) - (B*(1/(1 - x)^(3/(x - 1)) - 1)^2)/x^2 + (2*B*(1/(1 - x)^(3/(x - 1)) - 1)*(3/((x - 1)*(1 - x)^(3/(x - 1) + 1)) + (3*log(1 - x))/((x - 1)^2*(1 - x)^(3/(x - 1)))))/x
[ Last edited by shp011222 on 2010-5-9 at 20:39 ]，