Tiome_nguyen
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- Xu
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1. a neighborhood of -4 with radius 2 is described by :
A. |x-4|<= 2
B. |x-4|< 2
C. |x-2|<4
D. |x|<2
E. |x+4|<2
2. if f(x)=x^5 + x^3 + 1 and f(a)= 10, then f(-a)=
A. -7
B.10
C. -10
D. 8
E. -8
3.log(1/b) of x =
A. -log(b) of x
B. log(x) of b
C. -log(x) of b
D. b^x
E. none of the answer choices is correct.
4.the set of all points {(10^t , t)} is described by the equation
A. y =10^x
B. x = 10y
C. x= log(10) of y
D. y= log (10) of x
E. log(10) of x = log(10) of y
5. Which of the following functions is periodic with period π (pi)
A. y= sin x
B. y= πx
C. y=|cos x|
D. y= π
E. y= sin πx
6. f(a+b)= f(a) x f(b) is true if f(x) =
A. x
B. log(c) of x
C. sin x
D. 1/x
E. 3^x
7. How many of the following functions are symmetric about the y-axis ?
(i) y=x^2
(ii) y= spare root of (4 - x^2)
(iii) y= x
(iv) y= cos x
A. 0
B. 1
C. 2
D. 3
E. 4
A. |x-4|<= 2
B. |x-4|< 2
C. |x-2|<4
D. |x|<2
E. |x+4|<2
2. if f(x)=x^5 + x^3 + 1 and f(a)= 10, then f(-a)=
A. -7
B.10
C. -10
D. 8
E. -8
3.log(1/b) of x =
A. -log(b) of x
B. log(x) of b
C. -log(x) of b
D. b^x
E. none of the answer choices is correct.
4.the set of all points {(10^t , t)} is described by the equation
A. y =10^x
B. x = 10y
C. x= log(10) of y
D. y= log (10) of x
E. log(10) of x = log(10) of y
5. Which of the following functions is periodic with period π (pi)
A. y= sin x
B. y= πx
C. y=|cos x|
D. y= π
E. y= sin πx
6. f(a+b)= f(a) x f(b) is true if f(x) =
A. x
B. log(c) of x
C. sin x
D. 1/x
E. 3^x
7. How many of the following functions are symmetric about the y-axis ?
(i) y=x^2
(ii) y= spare root of (4 - x^2)
(iii) y= x
(iv) y= cos x
A. 0
B. 1
C. 2
D. 3
E. 4