Proving Two Exponential Equations are Equivalent

332 Views Asked by At

Prove that the following equations are equivalent, for $x$ belonging to all real numbers.

$2^{2x-1}=\frac{1}{2^{2x}-1}$ and $2^{2x+1}=\frac{1}{2^{2x-1}-1}$

My work: With the left equation I see $2^{2x-1}=\frac{1}{4^x-1}=\frac{1}{(2^x-1)(2^x+1)}$ and right equation is $2^{2x+1}=\frac{1}{4^x-2}$. Maybe logs are helpful but can't see the log properties that would be useful.

1

There are 1 best solutions below

2
On BEST ANSWER

The equations $$2^{2x-1}=\frac{1}{2^{2x}-1}$$ and $$2^{2x+1}=\frac{1}{2^{2x-1}-1}$$ are not equivalent.

Note that $x=1/2$ satisfies the first one but it does not satisfy the second one.

Also $x=\log_4 (1/2 +\sqrt2)$ satisfies the second one but it does not satisfy the first one.