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Question

i2+i4+i6+..........(2n+1)terms equal to:


A

i

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B

-i

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C

1

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D

-1

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Solution

The correct option is D

-1


Evaluating the given series.

i2+i4+i6+......(2n+1)terms=i2+i4+i6+...uptosomeoddnumberofterms=-1+1-1+...uptooddnumbertermsThelasttermwillhavereducedpower=2=-1

Hence, the correct answer is Option (D).


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