I'm trying to do the following composition:

$f:y=\frac{s+1}{s-1}$$,$ $g:y=\sqrt{s}$

My solution:

$Dg\circ f = (-\infty;-1] \cup(1;\infty) $

$g\circ f: y= \sqrt{\frac{s+1}{s-1}}$

Is my solution correct?


  • $\begingroup$ I don't see anything wrong with what you've done. Is there anything in particular you're not sure of? $\endgroup$ Oct 5 '19 at 17:16
  • $\begingroup$ @JohnOmielan No, I just wanted to be sure that I'm doing it right. Thanks $\endgroup$
    – Peter F.
    Oct 5 '19 at 17:18

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