Mathematics ECAT Pre Engineering Chapter 17 Functions and Limits Online Test With Answers

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Mathematics ECAT Pre Engineering Chapter 17 Functions and Limits Online Test

Sr. # Questions Answers Choice
1 2 6
2 2 -2 none of these
3 If f(x) = x2- x then f(-2) is 4 6 2 0
4 If f(x) = x2- x then f(2) is 4 6 2 0
5 If f(x) = x2-x then f(1) is 0 1 2 3
6 If f(x) = x2-x then f(0) is 0 1 2 3
7 If f(x) = -x3then f(-2) is -2 -4 -8 8
8 If f(x)= x3 then f(-2) is -2 -4 -8 8
9 If f(x) = -x2then f(-2) is -2 2 -4 4
10 If f(x) = (-x)2then f(-2) is 0 2 -4 4
11 If f(x) = x2then f(2) is -2 2 4 -4
12 If f(x) = x2then f(-2) is -2 2 4 -4
13 If f(x) = x2then f(0) is 0 1 2 none of these
14 If f(x) = x2then f(0) is 0 1 2 none of these
15 f(x) = x<sup>2</sup> f(x<sup>2</sup>) = x f(x) = x none of these
16 If y is an image of x under the function f, then we write y = f(x) x = f(y) y = x none of these
17 image pre-image constant none of these
18 images pre-images constants none of these
19 range of f domain of f both (a) and (b) none of these
20 x = f(y) y = f(x) x = f(x) y = f(y)
21 A function from X to X is denoted as f : X to Y f : Y to Y
22 A function from X to Y is written as f : X to Y f : Y to Y
23 A rule or correspondence that assigns to each element x in X a unique element y in Y is called a function from X to X X to Y Y to X none of these
24 A rule that assigns to each elements x in X a unique element y in Y is called a ____________ domain range function none of these
25 The range of function f(x)=-x2+2x-1 is R (-∞,0] (-∞,1] [0,∞)
26 Inverse of the function y-10x is y=logx y=lnx x=10y x=10y
27 If f(α) = b2 and g (c) =d where c=b2 then (gof)(a) is α c b d
28 The set of points {(x,y)|y = f(x),∀x∈} is called Relation Graph of f Function All are correct
29 If f (x) = 2x+1 then fof (x) = _______; 4x+3 2x +3 4x +1 None of these
30 The function f(x) =|x| is a/an_______function Even Odd Both even as well as odd Neither even nor odd
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