Sunday, 7 December 2014

algebra precalculus - Solve x=y2y for y

Make y the subject of x=y2y




I put this into Wolfram Alpha and it said the answer was (1±4x+12) but I have absolutely no idea how it got to that answer, so I'd appreciate if someone could explain it to me, thanks in advance.

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real analysis - How to find limhrightarrow0fracsin(ha)h

How to find limh0sin(ha)h without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...