Discussion about math, puzzles, games and fun. Useful symbols: ÷
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logged in. Post a reply Topic review (newest first) Glad about
that. Well I was a bit busy so I couldn't post... @ bob bundy
Well how can x = 0 makes the expression goes to +/- infinity as
dividing anything by 0 is undefined,and x is the denominator.
Thanks but I want to try this and the other problems by myself
now,but if I got stuck anywhere I will post it here. x + 2
changes sign at x = -2 so that will divide the cases we need to
consider. There's also something to consider at x = 0, as the
expression goes to infinity there. It looks as though this will
go to - infinity on one side of zero and + infinity on the
other. To simplify the expression you will have to multiply by
x, and that change of sign will influence the inequality sign.
So you need to consider 4 cases: (i) x < -2 (ii) x = -2 (iii) -2
< x < 0 (iv) 0 < x Do you want to try this and post what you get
or would you like more