i^2+i^4+i^6+ upto (2 n+1) terms = - Vidyadip

MCQ

$i^2+i^4+i^6+\ldots \ldots$ upto $(2 n+1)$ terms $=$

A
i
B
$-i$
C
1
✓
-1

✓

Answer

Correct option: D.

-1

(D)
Given expression is
$-1+1-1+1 \ldots$. upto $(2 n+1)$ terms
Here, number of terms are odd, so expression has the value -1 .

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