也就是说这个函数的指数是大于等于1的,考虑到底数是1/2,则:
y∈(0,1/2]谢谢,再请教一个问题。函数y=2的x次方加一 分之 2的X次方的值域为?2^x:表示2的x次方。设:2^x=t,则:t>0则这个函数的值域等价于:y=(t)/(t+1),其中t>0y(t+1)=tyt+y=tt=y/(1-y)因为:t>0,则:y/(1-y)>0y(y-1)<0得:0
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