# Quod Erat Demonstrandum

## 2009/01/15

### 中二數學：不等式

Filed under: Junior Form Mathematics,Teaching — johnmayhk @ 10:17 下午

If $a > b$, then $3a$ ______ $3b$.

How about filling in the following blank?

$3a$＿＿＿＿＿ $2b$

1. Given that $a > b$, find the conditions, in terms of $a$ and $b$ such that

(a) $3a > 2b$;
(b) $3a < 2b$;
(c) $3a = 2b$.

2. Try to generalize the above situations.