2013-I-09
Ans: (a) Mean $=3.5$, inter-quartile range $=2$, standard
… Read HKDSE-MATH
2013-II-01
Ans: B
$\begin{array}{cl}
& (27\cdot 9^{n+1})^3 \\
=
… Read $\begin{array}{cl}
& (27\cdot 9^{n+1})^3 \\
=
2013-II-02
Ans: D
$\begin{array}{rcl}
\dfrac{y-1}{c} & = &
… Read $\begin{array}{rcl}
\dfrac{y-1}{c} & = &
2013-II-03
Ans: D
$\begin{array}{cl}
& h\ell -k\ell + hm –
… Read $\begin{array}{cl}
& h\ell -k\ell + hm –
2013-II-04
Ans: C
$\begin{array}{cl}
& 0.050~454~5 \\
= & 0
… Read $\begin{array}{cl}
& 0.050~454~5 \\
= & 0
2013-II-05
Ans: A
Consider the first inequality, we have
… Read Consider the first inequality, we have
$\begin{arra
2013-II-06
Ans: C
$\begin{array}{rcl}
(x-k)^2 & = & 4k^2 \\
… Read $\begin{array}{rcl}
(x-k)^2 & = & 4k^2 \\
2013-II-07
Ans: B
Note that $b$ is the $y$-intercept of the graph. There
… Read Note that $b$ is the $y$-intercept of the graph. There
2013-II-08
Ans: A
$\begin{array}{rcl}
x(x+3a)+a & \equiv &
… Read $\begin{array}{rcl}
x(x+3a)+a & \equiv &
2013-II-09
Ans: D
Since $f(x)$ is divisible by $x+1$, we have
… Read Since $f(x)$ is divisible by $x+1$, we have
$\begin{a