-
ornelaspedro
- Junior | Next Rank: 30 Posts
- Posts: 10
- Joined: Wed Feb 18, 2009 9:15 pm
For every integer k 1 to 10, inclusive, the kth term of a certain sequence given by (-1)^k + 1 (1/2^k). If T is the sum of the first 10 terms in the sequence, then T is
greater than 2
between 1 and 2
between 1/2 and 1
between 1/4 and 1/2
less than 1/4
The answer is D can anybody show me a good approach for this?
greater than 2
between 1 and 2
between 1/2 and 1
between 1/4 and 1/2
less than 1/4
The answer is D can anybody show me a good approach for this?
