设f(x)=2^x-1/2^x+1(1)判断f(x)的单调性,并加以证明;(2)求证对任意非零实数,都有f(x)/x>0.
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![设f(x)=2^x-1/2^x+1(1)判断f(x)的单调性,并加以证明;(2)求证对任意非零实数,都有f(x)/x>0.](/uploads/image/z/3933606-30-6.jpg?t=%E8%AE%BEf%28x%29%3D2%5Ex-1%2F2%5Ex%2B1%281%29%E5%88%A4%E6%96%ADf%28x%29%E7%9A%84%E5%8D%95%E8%B0%83%E6%80%A7%2C%E5%B9%B6%E5%8A%A0%E4%BB%A5%E8%AF%81%E6%98%8E%EF%BC%9B%EF%BC%882%EF%BC%89%E6%B1%82%E8%AF%81%E5%AF%B9%E4%BB%BB%E6%84%8F%E9%9D%9E%E9%9B%B6%E5%AE%9E%E6%95%B0%2C%E9%83%BD%E6%9C%89f%28x%29%2Fx%3E0.)
设f(x)=2^x-1/2^x+1(1)判断f(x)的单调性,并加以证明;(2)求证对任意非零实数,都有f(x)/x>0.
设f(x)=2^x-1/2^x+1
(1)判断f(x)的单调性,并加以证明;
(2)求证对任意非零实数,都有f(x)/x>0.
设f(x)=2^x-1/2^x+1(1)判断f(x)的单调性,并加以证明;(2)求证对任意非零实数,都有f(x)/x>0.
1 f(x)=2^x-1/2^x+1
f(x1)=2^x1-1/2^x1+1
f(x2)=2^x2-1/2^x2+1
当x10.
当x
看不懂,函数没写明白
答案,能看得清么?