Q94
The sum of 100 terms of the series 1 - 3 + 5 - 7 + 9 - 11 .......... is:
A.
100
B.
- 200
C.
200
D.
- 100
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
1 - 3 + 5 - 7 + 9 - 11 .......... + 197 - 199= (- 2) + (-2) + (-2) + .......... + (-2) (50 times)
= 50 × (-2) = -100