Find each of the sums indicated or described. Show use of the appropriate formula, rather than simply using a calculator to add them.
1) The sum of the first 17 terms of a geometric series with a first term of 3000 and a common ratio of 1/2.
2) 7+9+11+13+... 10 terms
3) 1 + �ã2 + 2 + 2�ã2... 12 terms
2 answers
The "ã" are suppose to be square root symbols.
#1: S = 3000(1-1/2^17)/(1 - 1/2)
#2: S = 10/2 (2*7+2)
#3: S = 1(√2^12 - 1)/(√2-1)
#2: S = 10/2 (2*7+2)
#3: S = 1(√2^12 - 1)/(√2-1)
0 answers