Numbo the maths kitten
A cheerful teal kitten with bright eyes, a warm orange scarf, and a plus-sign medallion.
Maths with Numbo
☰
Home
Courses
Log In
Sign Up
TH
EN
←
Back to Lesson
?
Check what you have learned
Mock Exam 1: Relations, Functions & Inverse Trig Review
8
questions
✓
Choose the best answer
1
If f(x) = x + 5, what is f(2)?
🔊
A
7
✓
B
3
✓
2
In a function, how many codomain elements can each domain element be paired with?
🔊
A
Exactly one
✓
B
Exactly two
✓
3
Is f(x) = x² from R to R a one-one function?
🔊
A
No, because f(2)=f(-2)
✓
B
Yes, it is one-one
✓
4
A function that is both one-one and onto is called what?
🔊
A
Bijective
✓
B
Inverse function
✓
5
What does it mean for a function to be onto?
🔊
A
Every element in the codomain has a pre-image
✓
B
The domain and codomain are the same size
✓
6
What is sin⁻¹(1)?
🔊
A
π/2
✓
B
1
✓
7
What is tan⁻¹(1)?
🔊
A
π/4
✓
B
π/3
✓
8
What is the domain of sin⁻¹(x)?
🔊
A
[-1, 1]
✓
B
(-∞, ∞)
✓
Answered every question?
Take one last look, then submit your answers.
Submit Answers
→
