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

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**aftermath****Member**- Registered: 2012-12-28
- Posts: 6

hi , how to prove that the union of countable set and uncountable set is uncountable ? thanks

Offline

**scientia****Member**- Registered: 2009-11-13
- Posts: 224

Hint: Any set containing an uncountable subset is uncountable.

Offline

**aftermath****Member**- Registered: 2012-12-28
- Posts: 6

thank you scientia

Offline

**mathaholic****Member**- From: Earth
- Registered: 2012-11-29
- Posts: 3,025

Welcome to the forum, aftermath.

Mathaholic | 17th most active poster | 681st most recent person to join MIFF | Person | rrr's classmate

Offline

**aftermath****Member**- Registered: 2012-12-28
- Posts: 6

thanks julian i think this forum can help me a lot . GODbless !

Offline

Pages: **1**