Advanced MathEasyComparing outputs at opposite inputs
Advanced Math practice question
The function f is defined by f(x) = x² + 1. Which of the following is true?
- A. f(−2) and f(2) are equal.Correct
- B. f(−2) is less than f(2).
- C. f(−2) is greater than f(2).
- D. f(−2) equals 0.
Answer: A. f(−2) and f(2) are equal.
Both (−2)² and 2² equal 4, so both outputs are 5.
Why the other answers are wrong
- B. f(−2) is less than f(2).
- They are equal.
- C. f(−2) is greater than f(2).
- They are equal.
- D. f(−2) equals 0.
- f(−2) = 5.
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