Advanced MathEasy–MediumRecognising an exponential function
Advanced Math practice question
Which of the following functions is exponential?
- A. f(x) = 3·2ˣCorrect
- B. f(x) = 2x³
- C. f(x) = 3x + 2
- D. f(x) = x²
Answer: A. f(x) = 3·2ˣ
An exponential function has the variable in the exponent.
Why the other answers are wrong
- B. f(x) = 2x³
- A cubic: the variable is the base.
- C. f(x) = 3x + 2
- Linear.
- D. f(x) = x²
- Quadratic.
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