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Question

i2 + i4 + i6 + ........ upto (2n+1) terms =


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


Given expression is-1+1-1+1+......upto (2n+1) terms

Obviously number of terms is odd, so expression has the value -1.


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