指数函数怎么解?0.5=0.84^X (0.5=0.84的X次方) 这是例题,
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指数函数怎么解?
0.5=0.84^X (0.5=0.84的X次方) 这是例题,
0.5=0.84^X (0.5=0.84的X次方) 这是例题,
![指数函数怎么解?0.5=0.84^X (0.5=0.84的X次方) 这是例题,](/uploads/image/z/8159458-58-8.jpg?t=%E6%8C%87%E6%95%B0%E5%87%BD%E6%95%B0%E6%80%8E%E4%B9%88%E8%A7%A3%3F0.5%3D0.84%5EX+%280.5%3D0.84%E7%9A%84X%E6%AC%A1%E6%96%B9%EF%BC%89+%E8%BF%99%E6%98%AF%E4%BE%8B%E9%A2%98%2C)
两边取对数
lg(0.5) = xlg(0.84)
x = (lg0.5)/(lg0.84)
x =log0.84(0.5)
lg(0.5) = xlg(0.84)
x = (lg0.5)/(lg0.84)
x =log0.84(0.5)