IB myp 4-5 MATHEMATICS – Practice Questions- All Topics
Topic :Function-Function Notation
Topic :Function- Weightage : 21 %
All Questions for Topic : Mappings,Function notation,Linear functions,y=mx+c,Parallel and Perpendicular lines,System of equations/simultaneous equations,Quadratic functions,Algorithms
Question (7 marks)
The function $f(x)$ is defined for the domain $\{0,2,4,6\}$. The values of $f(x)$ are given in the table below.
Question (a) : 1 marks
Write down the value of $f(4)$.
▶️Answer/Explanation
Ans:
Based on the given table, we can see that when $x = 4$, the corresponding value of $f(x)$ is 2.
Therefore, $f(4) = 2$.
Question (b) : 2 marks
Determine the value of $3 \mathrm{f}(4)-1$.
▶️Answer/Explanation
Ans:
To determine the value of $3f(4) – 1$, we first need to find the value of $f(4)$ using the given table, which we already determined to be 2.
Now we can substitute this value into the expression:
$3f(4) – 1 = 3(2) – 1 = 6 – 1 = 5$
Therefore, the value of $3f(4) – 1$ is 5.