Use the method of mathematical induction to prove that is a multiple of for . Thanks
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Let's see if this holds water. , true. Assume 6 is a factor of . The (k+1)st term is = By the induction hypothesis, 6 is a factor of and 6 is a factor of 42, so 6 is a factor of the (k+1)st term and is true. And QED.
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