方程(a^2)e^(-ax)=(b^2)e^(-bx)(ab>0,a≠b)的解集是?答案:http://hi.baidu.com/%BA%AF%CA%FD____/album/item/9a696ca9496d68fcd0435847.html#要过程.麻烦大家了~~
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![方程(a^2)e^(-ax)=(b^2)e^(-bx)(ab>0,a≠b)的解集是?答案:http://hi.baidu.com/%BA%AF%CA%FD____/album/item/9a696ca9496d68fcd0435847.html#要过程.麻烦大家了~~](/uploads/image/z/6915303-63-3.jpg?t=%E6%96%B9%E7%A8%8B%28a%5E2%29e%5E%28-ax%29%3D%28b%5E2%29e%5E%28-bx%29%28ab%3E0%2Ca%E2%89%A0b%29%E7%9A%84%E8%A7%A3%E9%9B%86%E6%98%AF%3F%E7%AD%94%E6%A1%88%EF%BC%9Ahttp%3A%2F%2Fhi.baidu.com%2F%25BA%25AF%25CA%25FD____%2Falbum%2Fitem%2F9a696ca9496d68fcd0435847.html%23%E8%A6%81%E8%BF%87%E7%A8%8B.%E9%BA%BB%E7%83%A6%E5%A4%A7%E5%AE%B6%E4%BA%86%7E%7E)
方程(a^2)e^(-ax)=(b^2)e^(-bx)(ab>0,a≠b)的解集是?答案:http://hi.baidu.com/%BA%AF%CA%FD____/album/item/9a696ca9496d68fcd0435847.html#要过程.麻烦大家了~~
方程(a^2)e^(-ax)=(b^2)e^(-bx)(ab>0,a≠b)的解集是?
答案:http://hi.baidu.com/%BA%AF%CA%FD____/album/item/9a696ca9496d68fcd0435847.html#
要过程.麻烦大家了~~
方程(a^2)e^(-ax)=(b^2)e^(-bx)(ab>0,a≠b)的解集是?答案:http://hi.baidu.com/%BA%AF%CA%FD____/album/item/9a696ca9496d68fcd0435847.html#要过程.麻烦大家了~~
(a^2)e^(-ax)=(b^2)e^(-bx)
(a^2)/(b^2)*e^(-ax)=e^(-bx)
(a^2)/(b^2)=e^(ax)*e^(-bx)=e^((a-b)x)
两边取对数
2ln(a/b)=(a-b)x
x=2/(a-b)*ln(a/b)