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Online Tests
ECAT Pre General Science Mathematics Chapter 17 Functions and Limits Online Test MCQs With Answers
Question # 1
If f(x) = (-x)
2
then f(-2) is
Choose an answer
0
2
-4
4
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Question # 2
The domain of y = cos-1 x is
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-∞ < x < ∞
-1≤ x≤ 1
x≤ -1 or x ≥ 1
None of these
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Question # 3
Composition of functions is
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Non-commutative (fg ≠ gf)
non-associative [8(fh) ≠(8f)h]
Commutative (fg = gf)
f of-1≠ 1
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Question # 4
π
is the period of the function
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|sin x| + |sin x|
sin
4
x + cos x
sin (sin x) + sin (cos x)
None of these
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Question # 5
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0
-2
1
4
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Question # 6
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2
0
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Question # 7
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-2
-1
1
2
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Question # 8
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3/4
r
v
None of these
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Question # 9
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2
-1
8
not defined
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Question # 10
What is range of the function g (x) =|x-3|?
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[0 ,∞ )
(0 ,∞)
(-∞ ,3]
[0,∞)
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Question # 11
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quadratic function
constant function
linear function
exponential function
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Question # 12
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Question # 13
A rule or correspondence that assigns to each element x in X a unique element y in Y is called a function from
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X to X
X to Y
Y to X
none of these
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Question # 14
For f(x) = x2, what is the value of f(a) +f (-a) in terms of a?
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3a2
2a2
2a
-7a
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Question # 15
If y=f(x) is a function then y is called
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dependent variable
independent variable
constant
none of these
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Question # 16
The area of circle of unit radius =
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0
1
4
π
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Question # 17
f (x) = | x | is a/an
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Injective function
Bijective function
Surjective function
Implicit function
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Question # 18
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0
-4
none of these
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Question # 19
An even function is symmetric about the line
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y = x
x = 0
y = -x
y = 0
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Question # 20
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sin h x
cos h x
sec h x
cosec h x
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Question # 21
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Question # 22
sin h x = ___________
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Question # 23
Express the perimeter P of square as a function of its area A?
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P = 4√A
P =√A
P = 2A
P =π√A
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Question # 24
f(x) = x3-x/x2+1 is :
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an even function
an odd function
an even and implicit function
neither even nor a odd
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Question # 25
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2
4
8
12
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Question # 26
If f(x) = x
2
then f(-2) is
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-2
2
4
-4
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Question # 27
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sin h x
cos h x
tan h x
cot h x
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Question # 28
x = secθ,y = tanθ are the parametric equations of
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Circle
Hyperbola
Ellipse
parabola
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Question # 29
If f(x) = x
2
- x then f(-2) is
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4
6
2
0
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Question # 30
A function in which the variable appears as exponent is called:
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An identity function
A logarithmic function
an exponential function
A rational function
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Question # 31
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