Math 112 Final Exam Study Aid Worksheet With Answer Key Page 25
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39Math 112
Final Exam Study Aid
25 of 39
3
2
82. Find all the real zeros of f (x) = x
+ 5x
+ 7x + 2. The LARGEST real zero is:
3 +
5
3 +
13
(A)
(B)
0.5
(C)
2
2
3 +
7
(D)
(E)
2
2
4
3
2
83. Find all rational zeros of p(x) = x
4x
+2x
+5x 2. The SUM of all the RATIONAL
zeros is:
(A) 1
(B) 2
(C)
1
(D) 0
(E) There are no rational zeros
4
2
84. Find the value of ‘b’ so that x + 2 is a factor of P (x) = x
(b + 1)x
5bx
9b.
(A) b =
2
(B) b = 4
(C) b = 2
(D) b =
4
(E) None of these
4
2
85. Find all real zeros of f (x) = 3x
36x
+ 60. The SMALLEST real zero of f (x) is:
7
16
(A)
2
(B)
(C)
(D)
10
(E)
2
5
5
3
2
86. Factor T (x) = x
+ x
+ 13x + 30. One of the factors is:
(A) x + 3
(B) x
5
(C) x + 2
(D) x
10
(E) None of these
3
2
87. If 3 is a zero of f (x) = 18x
111x
+ 161x + 30, what are the other real zeros of f (x)?
The SMALLEST real zero is:
16
16
1
1
(A)
(B)
(C)
(D)
(E) 0
5
5
6
5
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