Act Math Practice
Intermediate Algebra Answer 1
Intermediate Algebra Answer 1:
1. Table of values for the functions f1(x) and f2(x) are given below. What is the value of f2(f1(1))?
| x |
f1(x) |
|
x |
f2(x) |
| --------- |
--------- |
|
--------- |
--------- |
| 1 |
4 |
|
1 |
1 |
| 2 |
5 |
|
2 |
4 |
| 3 |
6 |
|
3 |
9 |
| 4 |
7 |
|
4 |
16 |
A. 1
B. 4
C. 7
D. 9
E. 16
The correct answer is E.
First, solve for the function in the inner-most set of parenthesis, which in this problem is f1(1).
According to the table of values at the left above, for x = 1, f1(1) = 4
Then, take this new value to solve for f2(x)
According to the table of values at the right above, for x = 4, f2(4) = 16
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