方程log2(x-1)=2-log2(x+1)的解为

2025-02-27 08:23:26
推荐回答(1个)
回答1:

右边=log2(4)-log2(x+1)=log2[4/(x+1)]
x-1=4/(x+1)
x²-1=4
x²=5

真数大于0
x-1>0,x+1>0
x>1
x=√5