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Question
1 + i2 + i4 + i6 + ... + i2n is ______.
Options
Positive
Negative
0
Can not be evaluated
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Solution
1 + i2 + i4 + i6 + ... + i2n is can not be evaluated.
Explanation:
1 + i2 + i4 + i6 + ... + i2n = 1 – 1 + 1 – 1 + ... (–1)n
Which can not be evaluated unless n is known.
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