Exam-style question
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Using f(x) = x + 2 and g(y) = y^3, what is the value of (g ○ f)(1)?.
- A.3
- B.9
- C.27
- D.81
Model answer
What a good answer should say
- 27
Explanation
Why this works
f(1) = 1 + 2 = 3. Applying g to this result gives g(3) = 3^3 = 27.
Common mistake
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