Let $S(k) = 1 + 3 + 5 + \dots + (2k - 1) = 3 + k^2$. Then which of the following is true?

  • A
    Principle of mathematical induction can be used to prove the formula
  • B
    $S(k) \not\Rightarrow S(k + 1)$
  • C
    $S(k) \Rightarrow S(k + 1)$
  • D
    $S(1)$ is correct

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