medium · GMAT Quant
For a positive integer k, an automated logistics system calculates inventory efficiency using the expression E(k) = dfrack^4 - 16k^2k^3 + 4k^2. If E(k) = 9
What is the value of k^2 - 1?
- 12
- 13
- 24
- 168
- 170
Sign up free to see the explanation and track your rank →
More GMAT Quant practice
- Including both endpoints, how many distinct integer price points are in this range?
- Which of the following expressions must result in a positive value?
- Which property of arithmetic justifies that first step?
- Which of the following must also be an even integer?
- Which of the following inequalities correctly represents this range?
- Which of the following includes the number 0?
- How many unique meal combinations can a customer create?
- What is the probability that the lightbulb is functional?