a) for all (x,y,z)such that $xyz \gt 0$ b) For all (x,y,z)
Work Step by Step
a) $\ln x$ must be computed for positive values only. b) We can have any value of $\cos$.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.