medium · GMAT Quantitative Reasoning
A penalty-factor sequence is defined by a_1=2 and, for n≥ 2, a_n=-a_n-1 when n is odd and a_n=1/a_n-1 when n is even.
What is a_8?
- 7/2
- 2
- 3
- 7
- -2
Sign up free to see the explanation and track your rank →
More GMAT Quantitative Reasoning practice
- Including both endpoints, how many distinct integer price points are in this range?
- What is the final price of the jacket?
- How many total ways can the traveler get from City X to City Z?
- What is the speed of the current?
- Which of the following includes the number 0?
- If the child picks one letter at random, what is the probability that it is a consonant?
- Which of the following expressions must result in a positive value?
- Which of the following must also be an even integer?
All Quantitative Reasoning questions · GMAT study guide · GMAT glossary · GMAT flashcards