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Home / Fsc 2nd year Mcqs / FUNCTION AND LIMITS MCQs Ch#01with answers

# FUNCTION AND LIMITS MCQs Ch#01with answers

FUNCTION AND LIMITS MCQ Ch#01  consist of multiple Choice Questions with answers. Just read the MCQ and click on answer to check the mcqs answer.

Q.1 A rule that assigns to each element x in X a unique element y in Y is called a function from

(a) X to X

(b) X to Y

(c) Y to X

(d) Y to Y

b

Q.2. A function from X to Y is denoted by

(a)  f:X →X

(b) f:Y →X

(c) f:X →Y

(d) f:Y →Y

c

Q.3  A function from Y to X is denoted by

(a)  f:X →X

(b) f:Y →X

(c) f:X →Y

(d) f:Y →Y

b

Q.4 A function f:X →Y is defined by f(x) = c $\forall&space;x\in&space;X,c\in&space;Y$, has the domain equal to:  (Gujranwala Board. 2007)

(a) {c}

(b) R

(c) R-{c}

(d) X

d

Q.5 If y is expressed in terms of a variable x as y= f(x), then y is called      (Lahore Board. 2005)

(b) implicit function

(c) linear function

(d) identity function

a

Q.6 If  f: X→Y   is a function, then $y&space;\in&space;Y$ is called    (Lahore Board, 2006)

(a) dependent variable off

(b) independent variable of f

(c) range of f

(d) range of f

a

Q.7  If f: X→Y is a function, then the elements of X are called

(a) pre-images

(b) images

(c) constants

(d) ranges

a

Q.8 If f:X→Y is a function and $x&space;\in&space;X$, then

(a) f(x) = 1

(b) $f(x)&space;\in&space;Y$

(c) $f(x)&space;\in&space;X$

(d) $f(x)&space;\notin&space;Y$

b

Q.9 If f:X →f(X) is a function, then the elements of f(X) are called

(a) pre-images

(b) images

(c) constants

(d) ranges

b

Q.10 If y is an image of x under the function f, we write it as

(a) x = f (y)

(b) y = f (x)

(c) y = x

(d) $y&space;\neq&space;f(x)$

b

Q.11 $x^2+y^2=4$ is

(a) Function

(b) Not function

(c) Ellipse

(d) Line

(Lahore board, 2007)

a

Q.12 The function $f(x)=ax^2+bx+c$   has maximum value if

(a) a > 0

(b) a < 0

(c) a > 1

(d)   a > 2

(Lahore board, 2007)

b

Q.13  If $f&space;:&space;x&space;\rightarrow&space;-x^2$  is a function then

(a) f(x) = x

(b) f(x) = x²

(c) f(x) = x³

(d)  f(x) = -x²

d

Q.14  If $f&space;:&space;x&space;\rightarrow&space;-x^2$  is a function then f( 2 ) =

(a) -4

(b) -2

(c)  2

(d)  4

a

Q.15  If $f&space;:&space;x&space;\rightarrow&space;-x^2$  is a function then f( -2 ) =

(a) -4

(b) -2

(c)  2

(d)  4

a

Q.16  If $f&space;:&space;x&space;\rightarrow&space;(-x^2)$  is a function then f( -2 ) =

(a) -4

(b) -2

(c)  2

(d)  4

d

Q.17  If $f&space;:&space;x&space;\rightarrow&space;(-x^2)$  is a function then f( 2 ) =

(a) -4

(b) -2

(c)  2

(d)  4

d

Q.18  If y = f ( x ) is a function, then y is called

(a) dependent variable

(b) constant

(c)  independent variable

(d)  none of these

(Lahore board, 2008)

a

Q.19  If $f:&space;x&space;\rightarrow&space;x^3$  is a function then f( 2 ) =

(a)  8

(b) -2

(c)  2

(d)  -8

a

Q.20  If $f:&space;x&space;\rightarrow&space;x^3$  is a function then f( 2 ) =

(a)  8

(b) -2

(c)  2

(d)  -8

a

Q.20 If $f:x&space;\rightarrow&space;-x^3$  is a function then f( -2 ) =

(a)  8

(b) -2

(c)  2

(d)  -8

a

Q.21 If $f&space;:&space;x&space;\rightarrow&space;x+3$ is a function then f( 3 ) =

(a)  0

(b) 3

(c)  6

(d)  7

c

Q.22 If $f&space;:&space;x&space;\rightarrow&space;2x+5&space;\;then\;&space;f(2)\;&space;equals$

(a)  1

(b) 9

(c)  -9

(d)  -1

(Lahore board, 2007)

b

Q.23  If $f&space;:&space;x&space;\rightarrow&space;x+3$ is a function then f( 4 ) =

(a)  0

(b) 3

(c)  6

(d)  7

d

Q.24  If $f&space;:&space;x&space;\rightarrow&space;x-3$  is a function then f( 1 / 2) =

(a)  – 7 / 2

(b) – 5 / 2

(c)  – 3 / 2

(d)  – 1 / 2

b

Q.25 If $f&space;:&space;x&space;\rightarrow&space;x^2-2x+1$ is a function then f( 0 ) =

(a)  -1

(b)  0

(c)  1

(d)  2