%_The sum of 100 terms of the series1 -3 +5 -7 +9 -11 .......... is:_%

1.	%_The sum of 100 terms of the series1 -3 +5 -7 +9 -11 .......... is:_%
A.	100
B.	- 200
C.	200
D.	- 100
Answer» E.

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