Weird Proof by divisibility question Watch

Yr_11_MATHS
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How do you answer question 3
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Yr_11_MATHS
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Here is question
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mqb2766
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(Original post by Yr_11_MATHS)
Here is question
For part a) sub in k+1 and note
5^2(k+1) = 25*5^2k
....

Once you have the expression, the inductive proof is straightforward?
Last edited by mqb2766; 1 month ago
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