设f(x)=x+a^/x(x>0,a>0)(1)证明:函数f(x)在[a,+∞﹚上是增函数;(2)当x∈[1/3,3]时设f(x)=x+a^/x(x>0,a>0)(1)证明:函数f(x)在[a,+∞﹚上是增函数;(2)当x∈[1/3,3]时,求f(x)的最小值
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![设f(x)=x+a^/x(x>0,a>0)(1)证明:函数f(x)在[a,+∞﹚上是增函数;(2)当x∈[1/3,3]时设f(x)=x+a^/x(x>0,a>0)(1)证明:函数f(x)在[a,+∞﹚上是增函数;(2)当x∈[1/3,3]时,求f(x)的最小值](/uploads/image/z/6964912-64-2.jpg?t=%E8%AE%BEf%28x%29%3Dx%2Ba%5E%2Fx%28x%26gt%3B0%2Ca%26gt%3B0%29%EF%BC%881%EF%BC%89%E8%AF%81%E6%98%8E%EF%BC%9A%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E5%9C%A8%5Ba%2C%2B%E2%88%9E%EF%B9%9A%E4%B8%8A%E6%98%AF%E5%A2%9E%E5%87%BD%E6%95%B0%EF%BC%9B%EF%BC%882%EF%BC%89%E5%BD%93x%E2%88%88%5B1%2F3%2C3%5D%E6%97%B6%E8%AE%BEf%28x%29%3Dx%2Ba%5E%2Fx%28x%3E0%2Ca%3E0%29%EF%BC%881%EF%BC%89%E8%AF%81%E6%98%8E%EF%BC%9A%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E5%9C%A8%5Ba%2C%2B%E2%88%9E%EF%B9%9A%E4%B8%8A%E6%98%AF%E5%A2%9E%E5%87%BD%E6%95%B0%EF%BC%9B%EF%BC%882%EF%BC%89%E5%BD%93x%E2%88%88%5B1%2F3%2C3%5D%E6%97%B6%2C%E6%B1%82f%EF%BC%88x%EF%BC%89%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC)
设f(x)=x+a^/x(x>0,a>0)(1)证明:函数f(x)在[a,+∞﹚上是增函数;(2)当x∈[1/3,3]时设f(x)=x+a^/x(x>0,a>0)(1)证明:函数f(x)在[a,+∞﹚上是增函数;(2)当x∈[1/3,3]时,求f(x)的最小值
设f(x)=x+a^/x(x>0,a>0)(1)证明:函数f(x)在[a,+∞﹚上是增函数;(2)当x∈[1/3,3]时
设f(x)=x+a^/x(x>0,a>0)(1)证明:函数f(x)在[a,+∞﹚上是增函数;(2)当x∈[1/3,3]时,求f(x)的最小值
设f(x)=x+a^/x(x>0,a>0)(1)证明:函数f(x)在[a,+∞﹚上是增函数;(2)当x∈[1/3,3]时设f(x)=x+a^/x(x>0,a>0)(1)证明:函数f(x)在[a,+∞﹚上是增函数;(2)当x∈[1/3,3]时,求f(x)的最小值
可以用微积分么=.=应该是高一的题目吧……
那就是不用微积分呗.
1.设a
a^/x这是什么意思?