Advanced MathEasy–MediumInput of an exponential function from its output
Advanced Math practice question
In the xy-plane, the graph of y = 2ˣ passes through the point (a, 32). What is the value of a?
Answer: 5
2ᵃ = 32 = 2⁵, so a = 5.
Common wrong answers
- If you answered 4
- 4 gives 2⁴ = 16.
- If you answered 6
- 6 gives 2⁶ = 64.
- If you answered 16
- 16 is 32 ÷ 2, dividing instead of taking a logarithm.
More Advanced Math questions
- Easy–Medium
If f(x) = 2x² − 3, what is f(4)? - Easy–Medium
Which expression is equivalent to (2x³)(3x⁴)? - Easy–Medium
What are the solutions to x² − 16 = 0? - Easy–Medium
Which expression is equivalent to (x + 5)²? - Easy–Medium
For x ≠ 0, which expression is equivalent to (x² + 3x) / x? - Easy–Medium
What are the solutions to the equation 2(x − 3)² − 32 = 0 ?
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