If f(a)=a^2 and a is a positive integer, which of the following…

If f(a)=a^2 and a is a positive integer, which of the following CANNOT be the value of f(f(a))?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #57868

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