quote:Originally posted by s7a5
never did this type of problem b4, and substitution technique doesnt seem to work for it so maybe that's how it goes:
we know that :
(x^2 + 1/x^2)^1/2 = (x + 1/x)
Really? So... (5^2 + 1/6^2)^1/2 = (5 + 1/6)? No. If that were true, then (x + 1/x)^2 = (x^2 + 1/x^2), but if you work that out, it's (x^2 + 2 + 1/x^2)
This post was edited on 10-18-2006 at 01:52 AM by kotjze.
/ 
