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Prove that C1+C5+C9+....=1/2(2^(n-1)+2^(...

Prove that `C_1+C_5+C_9+....=1/2(2^(n-1)+2^(n//2)sin((npi)/4))`

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CENGAGE PUBLICATION-PROBABILITY-All Questions
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  3. Prove that C1+C5+C9+....=1/2(2^(n-1)+2^(n//2)sin((npi)/4))

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