â« [1 - tanh^2 (x)] - [1/(1 - x^2)]

I like Mathematica for graphing functions like this -- but you can graph it in Excel, I think, or do it on a graphing calculator (duh). If Excel doesn’t have the tanh function, you can find a table on the web, or look it up in a book such as Handbook of Chemistry and Physics and input the values for, say, x = 0 to 30 into a chart in Excel. ybarra-cgm.com

I used to graph them by hand on one sheet of graph paper , but, that was a long time ago.

ybarra-cgm.com

By inspection, the second term is going to be undefined at x = +/- 1 and get much smaller as x gets larger in the + or - direction.

OK, why are you asking this -- homework problem? copyright ybarra-cgm

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