2018-II-22
Ans: B
Consider $\Delta BDE$.
… Read Consider $\Delta BDE$.
$\begin{array}{rcll}
BD �
HKDSE-MATH - 2018
2018-II-23
Ans: B
Mark $O$ the centre of rotation. Mark also $A$ in the fi
… Read Mark $O$ the centre of rotation. Mark also $A$ in the fi
2018-II-24
Ans: A
… Read $\begin{array}{rcl}
\angle COE & = & 307^
2018-II-25
Ans: D
Note that the slope and the $y$-intercept of $L_1$ are
… Read Note that the slope and the $y$-intercept of $L_1$ are
2018-II-26
Ans: C
Sketch the graph below according to the information p
… Read Sketch the graph below according to the information p
2018-II-27
Ans: C
A is not true. Sub. $(0, 0)$ into the left side of the equ
… Read A is not true. Sub. $(0, 0)$ into the left side of the equ
2018-II-28
Ans: A
Note that the sample space is
… Read Note that the sample space is
$\begin{array}{|c|c|c
2018-II-29
Ans: C
Let $x$ be the mean of the numbers of pages of the remain
… Read Let $x$ be the mean of the numbers of pages of the remain
2018-II-30
Ans: A
Note that according to the stem-and-leaf diagram, $0
… Read Note that according to the stem-and-leaf diagram, $0
2018-II-31
Ans: C
A is not true. Note that the distances between the vert
… Read A is not true. Note that the distances between the vert
2018-II-32
Ans: C
I is true. If $a < 1$, the graph is like below.
… Read I is true. If $a < 1$, the graph is like below.
II is not true. Let $x_0$ be the $x$ coord
2018-II-33
Ans: D
By applying the two point form to the graph, we have
… Read By applying the two point form to the graph, we have
$\b
2018-II-34
Ans: C
Sketch the graph of the system of inequalities.
… Read Sketch the graph of the system of inequalities.
$\lef
2018-II-35
Ans: B
I is not true.
… Read I is not true.
$\begin{array}{rcl}
T(n) & =
2018-II-36
Ans: A
Note that $m$ and $n$ are the roots of $2x^2 + 5x = 14$. Th
… Read Note that $m$ and $n$ are the roots of $2x^2 + 5x = 14$. Th
2018-II-37
Ans: D
$\begin{array}{cl}
& \dfrac{2i^{12} + 3i^{13
… Read $\begin{array}{cl}
& \dfrac{2i^{12} + 3i^{13
2018-II-38
Ans: B
$\begin{array}{rcl}
6\cos^2 x & = & \cos x
… Read $\begin{array}{rcl}
6\cos^2 x & = & \cos x
2018-II-39
Ans: B
Join $AC$ and $AD$.
… Read Join $AC$ and $AD$.
Consider $\Delta ABC$.
$\begin{a
2018-II-40
Ans: A
Since $a 0 $, then sketch the below graph according to t
… Read Since $a 0 $, then sketch the below graph according to t
2018-II-41
Ans: D
On $AF$, add a point $Y$ such that $XY \perp AF$. Join $B
… Read On $AF$, add a point $Y$ such that $XY \perp AF$. Join $B