Find the Real Root of 4^x + 6^x = 9^x
- 时间:2020-09-07 12:13:31
- 分类:网络文摘
- 阅读:142 次
Given a equation
, let’s find the real value of x.
First, divide both sides by
which becomes:

as
, and
, it becomes:

Let’s replace
with
and further we have:
that is 
This equation has a golden root (the negative root should be discarded):
Therefore, 
and 
and 
and we can compute the value x that is approximately 1.187.
–EOF (The Ultimate Computing & Technology Blog) —
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