若(9,a)在函数y=log2x的图象上,则有关函数f(x)=a^x+a^-x性质的描述,正确提( )若(9,a)在函数y=log2x的图象上,则有关函数f(x)=a^x+a^-x性质的描述,正确提( )A.它是定义域为R的奇函数
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![若(9,a)在函数y=log2x的图象上,则有关函数f(x)=a^x+a^-x性质的描述,正确提( )若(9,a)在函数y=log2x的图象上,则有关函数f(x)=a^x+a^-x性质的描述,正确提( )A.它是定义域为R的奇函数](/uploads/image/z/10213660-28-0.jpg?t=%E8%8B%A5%EF%BC%889%2Ca%EF%BC%89%E5%9C%A8%E5%87%BD%E6%95%B0y%3Dlog2x%E7%9A%84%E5%9B%BE%E8%B1%A1%E4%B8%8A%2C%E5%88%99%E6%9C%89%E5%85%B3%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3Da%5Ex%2Ba%5E-x%E6%80%A7%E8%B4%A8%E7%9A%84%E6%8F%8F%E8%BF%B0%2C%E6%AD%A3%E7%A1%AE%E6%8F%90%EF%BC%88+%EF%BC%89%E8%8B%A5%EF%BC%889%2Ca%EF%BC%89%E5%9C%A8%E5%87%BD%E6%95%B0y%3Dlog2x%E7%9A%84%E5%9B%BE%E8%B1%A1%E4%B8%8A%2C%E5%88%99%E6%9C%89%E5%85%B3%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3Da%5Ex%2Ba%5E-x%E6%80%A7%E8%B4%A8%E7%9A%84%E6%8F%8F%E8%BF%B0%2C%E6%AD%A3%E7%A1%AE%E6%8F%90%EF%BC%88%E3%80%80%E3%80%80%EF%BC%89A%EF%BC%8E%E5%AE%83%E6%98%AF%E5%AE%9A%E4%B9%89%E5%9F%9F%E4%B8%BAR%E7%9A%84%E5%A5%87%E5%87%BD%E6%95%B0)
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