DETERMINE THE MINIMUM VALUE OF THE EXPRESSION ZYXXZYZXYZYX2 + 2 +5...
12. Determine the minimum value of the expression
z
y
x
xz
yz
xy
x
2
+
2
+
5
2
−
−
3
−
+
3
−
4
+
7
,
where x , y and z are real numbers.
Answer:_________________________.
Section II: Answer the following 3 questions, and show your detailed
solution in the space provided after each question. Write down the question
number in each paper. Each question is worth 20 points.