Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized for You
we will pick new questions that match your level based on your Timer History
Track Your Progress
every week, we’ll send you an estimated GMAT score based on your performance
Practice Pays
we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
After just 3 months of studying with the TTP GMAT Focus course, Conner scored an incredible 755 (Q89/V90/DI83) on the GMAT Focus. In this live interview, he shares how he achieved his outstanding 755 (100%) GMAT Focus score on test day.
Grab 20% off any Target Test Prep GMAT Focus plan during our Flash Sale. Just enter the coupon code FLASH20 at checkout to save up to $320. The offer ends on Tuesday, April 30.
Sayali narrates her experience of succeeding on the GMAT after 4 attempts & 2 years of preparations. Sayali achieved 99 percentile score on GMAT Focus edition after significantly improving her performance in verbal section of the GMAT
In this conversation with Ankit Mehra, IESE MBA and CEO & Co-Founder, of GyanDhan, we will discuss how prospective MBA students can finance their MBA education with education loans and scholarships.
What do András from Hungary, Pablo from Mexico, Conner from the United States, Giorgio from Italy, Leo from Germany, and Rishab from India have in common? They all earned top scores on the GMAT Focus Edition using the Target Test Prep course!
Ready to conquer GMAT's toughest Data Insights questions? Unlock the secrets of Graphical Interpretation & Two-Part Analysis with our expert-led webinar! Limited seats!
What do András from Hungary, Conner from the United States, Giorgio from Italy, Leo from Germany, and Saahil from India have in common? They all earned top scores on the GMAT Focus Edition using the Target Test Prep course!
Re: Question about functions
[#permalink]
06 May 2013, 06:22
Expert Reply
DmitryFox83 wrote:
Hey everybody! I can't understand the explanation about this task, if anyone can help me with it? The task is in Uploaded attachment. Thanks a lot!
Hi,
Approach for the function questions: 1. You need to plugin values of the functions given in each option in the question given and see if that option satisfies the question expression. 2. If it does then that's your answer else 3. move to next option and follow the same exercise
In the given questions they are asking you if g(a) = g(3-a) and they have given you 5 options. What you need to do is plugin the options in the question and see if it satisfies. Option 1: g(a) = 2a so, g(3-a) =2(3-a) [ we just substituted (3-a) in place of "a" in g(a) to get g(3-a)] = 6-2a question : Is g(a) = g(3-a) substitute the values of g(a) and g(3-a) we get 2a = 6-2a ? we dont know if it is equal [it can be equal for some values of a but in general we dont know] so, A is not the answer.
Moving on to B g(a) = a^2 g(3-a) = (3-a)^2 here also, g(a) can be or cannot be equal to g(3-a) so, B is not the answer.
Moving on to C g(a) = a(3-a) g(3-a) = (3-a) ( 3-(3-a)) = (3-a) (3-3 + a) = (3-a)a = a(3-a) g(a)=g(3-a) for all values of a so, C is the answer.
Similarly you can check for D and E and you will get that g(a) can be or cannot be equal to g(3-a)
hence, answer will be C
Also, in these kind of questions what you can do is Only for those functions g(a) will be equal to g(3-a) which are symmetric in terms of a and (3-a), or functions in which "a" and (3-a) have the same power and stuff As you see in option C g(a) = a*(3-a) both "a" and (3-a) have same power 1
also, if you had g(a) = a/(a * (3-a)) then also you have same powers of "a" and (3-a) which is -1 so for this also g(a) will be equal to g(3-a)
hope it helps!
Archived Topic
Hi there,
Archived GMAT Club Tests question - no more replies possible.