Advanced MathHardInput for a target output of an exponential minus one
Advanced Math practice question
The function p is defined by p(x) = 2ˣ − 1. For what value of x is p(x) = 31?
Answer: 5
2ˣ = 32 = 2⁵, so x = 5.
Common wrong answers
- If you answered 4
- 4 gives 15.
- If you answered 16
- 16 halves 32.
- If you answered 31
- 31 is the output.
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