To prove “every multiple of 4 is even”, we can write a multiple of 4 as 4k and note that:

  1. 4k = 4 + k
  2. 4k = 2(2k)
  3. 4k = 2 + 2k
  4. 4k = k^4
Answer

B) 4k = 2(2k)

4k = 2(2k) is 2 times an integer, so it is even. SLO M-09-B-13 · Knowledge

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