2013-II-30
Ans: B
A may not be true. The proportion of the profit from the
… Read A may not be true. The proportion of the profit from the
HKDSE-MATH
2013-II-31
Ans: B
$\begin{array}{rcl}
a^2+4a+4 & = & (a+2)
… Read $\begin{array}{rcl}
a^2+4a+4 & = & (a+2)
2013-II-32
Ans: B
According to the figure, we have $0 < b < 1$ and
… Read According to the figure, we have $0 < b < 1$ and
$\begin{array}{r
2013-II-33
Ans: A
$\begin{array}{cl}
& \text{A}00~000~\text{
… Read $\begin{array}{cl}
& \text{A}00~000~\text{
2013-II-34
Ans: D
$\left\{\begin{array}{ll}
x-\log y = 2 & \ldot
… Read $\left\{\begin{array}{ll}
x-\log y = 2 & \ldot
2013-II-35
Ans: D
According to the given system of equations, $\alpha$
… Read According to the given system of equations, $\alpha$
2013-II-36
Ans: A
$\begin{array}{cl}
& i + 2i^2+3i^3+4i^4 \\
= &#
… Read $\begin{array}{cl}
& i + 2i^2+3i^3+4i^4 \\
= &#
2013-II-37
Ans: C
Sketch the system of inequalities, we have
… Read Sketch the system of inequalities, we have
Note that $
2013-II-38
Ans: C
Let $T(n) = 2n-19$, where $n$ is a positive integer.
… Read Let $T(n) = 2n-19$, where $n$ is a positive integer.
I i
2013-II-39
Ans: A
Consider the graph of $y=\tan x^\circ$.
… Read Consider the graph of $y=\tan x^\circ$.
By comparing
2013-II-40
Ans: B
Let $2x\text{ cm}$ be the length of a side of the tetrah
… Read Let $2x\text{ cm}$ be the length of a side of the tetrah
2013-II-41
Ans: D
Join $BC$.
… Read Join $BC$.
$\begin{array}{rcl}
\angle BAC & = &
2013-II-42
Ans: B
$\left\{ \begin{array}{ll}
x^2+y^2+2x-2y-7=0 �
… Read $\left\{ \begin{array}{ll}
x^2+y^2+2x-2y-7=0 �
2013-II-43
Ans: A
Note that the perpendicular bisector of $OA$ is $y=6$
… Read Note that the perpendicular bisector of $OA$ is $y=6$
2013-II-44
Ans: C
The number of different numbers
… Read The number of different numbers
$\begin{array}{cl}
2013-II-45
Ans: C
Let $\overline{x}$ be the mean of the five numbers $x_
… Read Let $\overline{x}$ be the mean of the five numbers $x_