A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data are needed.
Explanation:
This question asks whether the information in one or both statements is sufficient to find a specific value. But we don't actually have to determine the value, just know that it can be determined.
(1) Quadratic equations have two solutions. However, sometimes those two solutions are identical with each other. If they are different, then solving this equation will lead to two possible values of x, and presumably also two possible values of f(x), so this would not be sufficient. But if they are the same, i.e. if there's really only one solution to this equation, then we would definitely know x, definitely know f(x), and...
Categories : GMAT 800, GMAT 800 Data Sufficiency

Categories : GMAT 800 Data Sufficiency, Exponents
If n and a are positive integers, what is the units digit of n^(4a+2) – n^(8a)? 
Top 31 MBA Programs + Analysis of 24 Industries (United States)
We analyze the MBA Curriculum, Class Profile, Total Cost and PostMBA Salary of Top 31 MBA programs in the US.
+ Industry Trends
+ Future of Aerospace, Agriculture, Artificial Intelligence (AI), Automobile, Clean Tech, Education, Energy, Fashion, Financial Services, Insurance, FinTech, Government, Healthcare, Life Sciences, Military, Manufacturing, Maritime, Media/Advertising, Technology, Tourism, Trade, Transportation and Logistics, Virtual Reality (VR), and Augmented Reality (AR).
Pages: 327
Reviews
"I have not reviewed many books for MBA Admission consulting companies but doing it now to give all applicants a brief idea on what the book covers. The book includes 31 top MBA programs  almost all the top schools you have heard or considering for your MBA application. Each chapter is categorized by US States where there is at least one top MBA program. So you have California and Massachusetts with the most number of MBA programs and several states with one top program (Washington, Minnesota, Washington D.C., Connecticut, Virginia, and Maryland) and other states with two to three MBA programs. The book focuses on four aspects of an MBA program  curriculum, cost, class profile and postMBA salary. For me, the breakdown of the cost and postMBA industry was useful to make my decision on selecting the top 5 programs for 201718. It is a fascinating read in an industry where consultants overprice for their expertise. I recently bought a 30page guide for $49. Compared to the obvious observation in that book, the 300+ page, MBA in US  the Ultimate guide is a goldmine of information and analysis."  Verified Purchase (21st June 2017)
"I bought the ultimate guide after a friend recommended it for me. The guide covers a lot of ground on the history of each prominent US states and goes into the reasons why a certain industry emerged from each state. In addition to the analysis of the economy, trends and expected changes in the next 5 years, the book features top MBA programs in each state with an extensive study of its curriculum. Ultimate guide is an essential reference book for MBA Applicants if they want to shortlist MBA programs based on value and cost, and not just ranking. "  Verified Purchase (14th June 2017)
"Should be a required reading before applying for an MBA. School events and MBA Tours are PR events disguised as a Q&A. On the contrary, the book is an unbiased analysis of each Top MBA program in the US supported by a large dataset and historical context on each industry. The guide builds a case for indstries that are likely to emerge as favourite for MBA graduates. Thorough and a valuable book."  Verified Purchase (15th June 2017)
"What I liked: The breadth of the information. Some of my favorite nonfiction books have taken the same approach as the ultimate guide have  cover background information indepth. In the book, the author uses parallel threads to demonstrate the history of the state and the rise of industries. Will make you think how schools thrive based on the policy set by the state. California's obsession with Technology has revolutionized how we do Business and changed postMBA trends. Many MBA applicants will be consulting or doing marketing for a Technology company. That is one key finding from the book. The latest development in AI, FinTech, and Automation is an additional context that I found valuable in the book.
Very informative. I would recommend that you read the book at least once in chronological order before using Table of Contents."  Verified Purchase (2nd July 2017)
Download How to Choose the Best MBA in US: The Ultimate Guide
(2018 Entering Class)