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Yep, answer is D, good job Bhushan, they key is to see that x is even, as you said, and then you have +1 -1 + 1 -1 +1 = 1
Yep, answer is D, good job Bhushan, they key is to see that x is even, as you said, and then you have +1 -1 + 1 -1 +1 = 1
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