# Quod Erat Demonstrandum

## 2010/04/15

### 無聊數學教學

Filed under: HKCEE,Junior Form Mathematics,mathematics,NSS — johnmayhk @ 6:05 下午
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【其一】

1. If the equation $k^2x^2 - (k+2)x + 1 = 0$ has real roots and k is a constant. find the range of values of k.

2. If the quadratic equation $k^2x^2 - (k+2)x + 1 = 0$ has real roots and k is a constant. find the range of values of k.

【其二】

$\frac{4-(-5)}{2-(-1)} = \frac{6-(-3)}{2+k-(k-1)}$
$3 = 3$