# Camus

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 9 How to use math textbooks 4 Do we need to formally teach the Greek Alphabet? 4 Truth set of $-|x| \lt 2$? 2 Proving $(5-\frac5k )(1+\frac{1}{(k+1)^2}) \le 5 - \frac{5}{k+1}$ 2 Word Problems(sats practice booklet)

# 300 Reputation

 +40 Do we need to formally teach the Greek Alphabet? +2 Proving an inequality involving factorials. +5 How do I derive $(\forall x)(\forall y)(\exists z)(x = y \circ z)$ from these three group axioms and some previously established theorems? +15 Proving $(5-\frac5k )(1+\frac{1}{(k+1)^2}) \le 5 - \frac{5}{k+1}$

# 2 Questions

 1 How do I derive $(\forall x)(\forall y)(\exists z)(x = y \circ z)$ from these three group axioms and some previously established theorems? 1 Truth set of $-|x| \lt 2$?

# 13 Tags

 6 inequality × 3 2 induction 4 absolute-value × 2 0 proof-writing × 2 4 soft-question × 2 0 predicate-logic × 2 4 teaching 0 proof-strategy × 2 2 algebra-precalculus 0 logic × 2

# 10 Accounts

 Mathematics 300 rep 113 TeX - LaTeX 208 rep 16 English Language & Usage 193 rep 5 Arqade 148 rep 3 Biology 108 rep 3