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#### sweatingbear

##### Member

- May 3, 2013

- 91

\(\displaystyle \ln \left( x - \sqrt{1 + x^2 } \right) \, .\)

Trying different values for \(\displaystyle x\) in my head, I confidently concluded that this function does not have any outputs in the real numbers. I attempted to plot it in Maple but Maple showed me a blank coordinate system (expectedly). However, this is what WolframAlpha outputs.

It looks like a flipped hyperbolic sine, but is WolframAlpha even displaying correctly to begin with?