Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #2 20051120 02:54:16
Re: Could someone help me please? :)Let a ∈ ℝ. Accoding to you condition, a<0, we can build the set: #4 20051120 07:36:43
Re: Could someone help me please? :)He hasn't complained yet 