log(9)(16)*log(8)(81)能用换底公式解吗我将上述公式化为【log(10)(16)/log(10)(9)】*【log(10)(81)/log(10)(8)】=(16/9)*(81/8)=18,结果错了,求正解,还有我为什么错了?
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![log(9)(16)*log(8)(81)能用换底公式解吗我将上述公式化为【log(10)(16)/log(10)(9)】*【log(10)(81)/log(10)(8)】=(16/9)*(81/8)=18,结果错了,求正解,还有我为什么错了?](/uploads/image/z/5439231-63-1.jpg?t=log%EF%BC%889%EF%BC%89%EF%BC%8816%EF%BC%89%2Alog%EF%BC%888%EF%BC%89%EF%BC%8881%EF%BC%89%E8%83%BD%E7%94%A8%E6%8D%A2%E5%BA%95%E5%85%AC%E5%BC%8F%E8%A7%A3%E5%90%97%E6%88%91%E5%B0%86%E4%B8%8A%E8%BF%B0%E5%85%AC%E5%BC%8F%E5%8C%96%E4%B8%BA%E3%80%90log%EF%BC%8810%EF%BC%89%EF%BC%8816%EF%BC%89%2Flog%EF%BC%8810%EF%BC%89%EF%BC%889%EF%BC%89%E3%80%91%2A%E3%80%90log%EF%BC%8810%EF%BC%89%EF%BC%8881%EF%BC%89%2Flog%EF%BC%8810%EF%BC%89%EF%BC%888%EF%BC%89%E3%80%91%3D%EF%BC%8816%2F9%EF%BC%89%2A%EF%BC%8881%2F8%EF%BC%89%3D18%2C%E7%BB%93%E6%9E%9C%E9%94%99%E4%BA%86%2C%E6%B1%82%E6%AD%A3%E8%A7%A3%2C%E8%BF%98%E6%9C%89%E6%88%91%E4%B8%BA%E4%BB%80%E4%B9%88%E9%94%99%E4%BA%86%3F)
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log(9)(16)*log(8)(81)能用换底公式解吗我将上述公式化为【log(10)(16)/log(10)(9)】*【log(10)(81)/log(10)(8)】=(16/9)*(81/8)=18,结果错了,求正解,还有我为什么错了?
log(9)(16)*log(8)(81)能用换底公式解吗
我将上述公式化为【log(10)(16)/log(10)(9)】*【log(10)(81)/log(10)(8)】=(16/9)*(81/8)=18,结果错了,求正解,还有我为什么错了?求名师指导~~~
log(9)(16)*log(8)(81)能用换底公式解吗我将上述公式化为【log(10)(16)/log(10)(9)】*【log(10)(81)/log(10)(8)】=(16/9)*(81/8)=18,结果错了,求正解,还有我为什么错了?
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log(9)(16)*log(8)(81)能用换底公式解吗我将上述公式化为【log(10)(16)/log(10)(9)】*【log(10)(81)/log(10)(8)】=(16/9)*(81/8)=18,结果错了,求正解,还有我为什么错了?
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