Advanced MathEasyEvaluating a shifted exponential
Advanced Math practice question
The function s is defined by s(x) = 2ˣ + 3. What is the value of s(2)?
Answer: 7
s(2) = 2² + 3 = 4 + 3 = 7.
Common wrong answers
- If you answered 8
- 8 is 2³, again mixing the +3 into the exponent.
- If you answered 10
- 10 is 2 × 2 + 3 + 3, adding the 3 twice; s(2) = 2² + 3 = 7.
- If you answered 32
- 32 is 2⁵, adding the 3 to the exponent instead of to the result.
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