2020-II-21
Ans: C
In $\Delta BCE$,
… Read In $\Delta BCE$,
$\begin{array}{cl}
& BE^2 + BC
HKDSE-MATH
2020-II-22
Ans: C
Join $AC$ and $AD$.
… Read Join $AC$ and $AD$.
Consider $\Delta ABC$. Since $\an
2020-II-23
Ans: B
We sketch a graph according to the question.
… Read We sketch a graph according to the question.
Note that
2020-II-24
Ans: D
Since the coordinates of the reflection image of $Q$ w
… Read Since the coordinates of the reflection image of $Q$ w
2020-II-25
Ans: A
Note that the intersection of the two straight lines i
… Read Note that the intersection of the two straight lines i
2020-II-26
Ans: D
The slope of $L$
… Read The slope of $L$
$\begin{array}{cl}
= & \dfrac{
2020-II-27
Ans: C
I is true. Rewrite the equation of $C_1$, then the equa
… Read I is true. Rewrite the equation of $C_1$, then the equa
2020-II-28
Ans: B
Note that the sample space is
… Read Note that the sample space is
$\begin{array}{|c|c|c
2020-II-29
Ans: A
Note that there are $28$ students in the distribution
… Read Note that there are $28$ students in the distribution
2020-II-30
Ans: A
Since the range is $9$, then we have $3 \le m, n \le 9$.
… Read Since the range is $9$, then we have $3 \le m, n \le 9$.
I m
2020-II-31
Ans: B
$\begin{array}{cl}
& \text{B}\ 000\ 000 \ 000\
… Read $\begin{array}{cl}
& \text{B}\ 000\ 000 \ 000\
2020-II-32
Ans: B
$\begin{array}{rcl}
(\log_\pi x)^2 -10\log_\pi x +
… Read $\begin{array}{rcl}
(\log_\pi x)^2 -10\log_\pi x +
2020-II-33
Ans: D
I is true. The graph of $y=a^x$ for $a < 1$ is
… Read I is true. The graph of $y=a^x$ for $a < 1$ is
II is true. The gra
2020-II-34
Ans: C
By the intercepts form, the equation of the straight l
… Read By the intercepts form, the equation of the straight l
2020-II-35
Ans: D
I is an arithmetic sequence.
… Read I is an arithmetic sequence.
$\begin{array}{cl}
�
2020-II-36
Ans: C
Sketch the system of inequalities as follow.
… Read Sketch the system of inequalities as follow.
Sub. $x=
2020-II-37
Ans: C
$\begin{array}{cl}
& z_1 \\
= & \dfrac{2+
… Read $\begin{array}{cl}
& z_1 \\
= & \dfrac{2+
2020-II-38
Ans: A
By applying Pythagoras Theorem to $\Delta ABP$, we ha
… Read By applying Pythagoras Theorem to $\Delta ABP$, we ha
2020-II-39
Ans: A
Add a point $F$ on the circle $CDE$. Join $DF$ and $EF$.
… Read Add a point $F$ on the circle $CDE$. Join $DF$ and $EF$.
2020-II-40
Ans: D
Sketch a graph according to the question.
… Read Sketch a graph according to the question.
Note that $4