一道数学合情推理题,明天考试急需求“方程(5/13)^x+(12/ 13 )^x=1的解”有如下解题思路:设f(x)=(5/13)^x+(12/ 13 )^x,则f(x)在R上单调递减,且f(2)=1,所以原方程有唯一解x=2.类比上
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![一道数学合情推理题,明天考试急需求“方程(5/13)^x+(12/ 13 )^x=1的解”有如下解题思路:设f(x)=(5/13)^x+(12/ 13 )^x,则f(x)在R上单调递减,且f(2)=1,所以原方程有唯一解x=2.类比上](/uploads/image/z/13334616-0-6.jpg?t=%E4%B8%80%E9%81%93%E6%95%B0%E5%AD%A6%E5%90%88%E6%83%85%E6%8E%A8%E7%90%86%E9%A2%98%2C%E6%98%8E%E5%A4%A9%E8%80%83%E8%AF%95%E6%80%A5%E9%9C%80%E6%B1%82%E2%80%9C%E6%96%B9%E7%A8%8B%EF%BC%885%2F13%EF%BC%89%5Ex%2B%EF%BC%8812%2F+13+%EF%BC%89%5Ex%3D1%E7%9A%84%E8%A7%A3%E2%80%9D%E6%9C%89%E5%A6%82%E4%B8%8B%E8%A7%A3%E9%A2%98%E6%80%9D%E8%B7%AF%EF%BC%9A%E8%AE%BEf%EF%BC%88x%EF%BC%89%3D%EF%BC%885%2F13%EF%BC%89%5Ex%2B%EF%BC%8812%2F+13+%EF%BC%89%5Ex%2C%E5%88%99f%EF%BC%88x%EF%BC%89%E5%9C%A8R%E4%B8%8A%E5%8D%95%E8%B0%83%E9%80%92%E5%87%8F%2C%E4%B8%94f%EF%BC%882%EF%BC%89%3D1%2C%E6%89%80%E4%BB%A5%E5%8E%9F%E6%96%B9%E7%A8%8B%E6%9C%89%E5%94%AF%E4%B8%80%E8%A7%A3x%3D2%EF%BC%8E%E7%B1%BB%E6%AF%94%E4%B8%8A)
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