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AAI ATC MATHS PRACTICE
Relations & Functions – MCQ
20 Questions • Aviation Light Theme
1) Which of the following is a function?
Correct → B and D are functions
2) Domain of {(2,5), (3,6), (4,8), (2,7)} is:
Correct → {2,3,4}
3) Range of {(1,1), (2,3), (4,3)} is:
Range = {1,3}
4) Every function is always a:
Every function is a relation ✔
5) If A = {1,2} and B = {3,4,5}, number of relations from A to B:
2⁶ = 64 → Correct answer 64
6) n(A)=5, n(B)=3 → number of functions from A to B?
3⁵ = 243
7) A function cannot map one element to:
It cannot map one input to two different outputs
8) If f(x)=3x+2, find f(4):
3×4 + 2 = 14
9) If f(x)=x² – 1, find f(–3):
(–3)² – 1 = 9 – 1 = 8
10) Which is One–One?
f(x)=2x ✔
11) Onto function means:
All co-domain elements are mapped ✔
12) (f ∘ g)(x) = ?
f(g(x)) ✔
13) If f(x)=x+3, find f(0):
14) f(–x) = –f(x) means:
15) f: R → R means:
16) f(x)=x² is:
17) Which is true?
18) Bijective means:
19) For inverse to exist, function must be:
20) {(1,2), (1,4), (3,5)} is: