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Not sure, if a post for this is already there in the forum or not. But I can help quickly, whenever we think of the domain of a function, we need to think what is the range of the values that the given function can take as an argument or input. In the given function there are 3 square roots and we know in GMAT the square root can take up only non-negative numbers. Thus you have 3 conditions, for the 3 roots, in this question (1) sqrt(x+2) - sqrt(4-x) ≧ 0 (2) x+2 ≧ 0(3) 4-x ≧ 0. Solving for ranges of x we get, from (1) x+2 ≧ 4-x => x ≧ 1 (2) x ≧ -2 (3) x ≦ 4. After checking the overlap in values between these 3 inequalities you’ll get choice D. However the inequality should be 1 ≦ x ≦ 4

This question is discussed here: the-domain-of-the-function-f-x-sqrt-sqrt-x-2-sqrt-4-x-417072.html

Does anyone know how to answer this one (part of the exam 5 practice)? if x and y are integers and if (x-y)^2 + 2y^2 = 27 , which of the following could be the value of x?

possible answer: -2, -1, 3, 4, 5.

Thank you for your help!

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Discussed here:

https://gmatclub.com/forum/if-x-and-y-a ... 22175.html

You can try searching here for other PS questions: https://gmatclub.com/forum/problem-solving-ps-140/

you are the best. thanks

Data Sufficiency Butler: April 2024
May 10	DS 1	DS 2

Problem Solving Butler: April 2023
May 10	PS 1	PS 2

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I have started studying number properties but now I am really confused where to study and what to study. Can anyone tell what should I do?

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Hi Bunuel, I am not able to select questions and take them as quiz on forums,
the check boxes are not appearing for me to select questions, has something changed recently?

guys I am stuck at Q79

What should I do

Which ques are getting wrong

@sayan

word problems

bigger word problems

i get lost after seeing them

yes

silly mistakes

oversight

then try to focus on that