Mathematics B Regents High School Examination - The University Of The State Of New York, 2006 Page 4
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28Use this space for
11 What is the total number of points of intersection for the graphs of the
computations.
2
2
equations y = x
and y = –x
?
(1) 1
(3) 3
(2) 2
(4) 0
12 For which equation is the sum of the roots equal to the product of the
roots?
2
2
(1) x
+ x + 1 = 0
(3) x
– 8x – 4 = 0
2
2
(2) x
+ 3x – 6 = 0
(4) x
– 4 x + 4 = 0
13 If the perimeter of an equilateral triangle is 18, the length of the
altitude of this triangle is
(1) 6
(3) 3
6 3
3 3
(2)
(4)
2
3
4
5
6
+
+
+
+
14 Jonathan’s teacher required him to express the sum
3
4
5
6
7
using sigma notation. Jonathan proposed four possible answers. Which
of these four answers is not correct?
7
5
−
+
∑
∑
k
1
k
1
(1)
(3)
+
k
2
k
=
=
k
1
k
3
6
5
∑
∑
k
k
(2)
(4)
+
+
k
1
k
1
=
=
k
2
k
1
1
= 2 sin
15 What is the period of the graph of the equation
?
y
x
3
2
π
(1)
(3) 6π
3
π
3
(2) 2π
(4)
2
[4]
Math. B – Aug. ’06
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