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Use strong induction to show that every positive integer can be written as a sum of...

Use strong induction to show that every positive integer can be written as a sum of distinct powers of two (i.e., 20 = 1; 21 = 2; 22 =4; 23 = 8; 24 = 16; :).

For example: 19 = 16 + 2 + 1 = 2^4 + 2^1 + 2^0

Hint: For the inductive step, separately consider the case where k +1 is even and where it is odd. When it is even, note that (k + 1)=2 is an integer.

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