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If f(x) = |x| + [x] where [x] is the greatest integer less than or equ
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15 Mar 2021, 10:32
15 Mar 2021, 10:32
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If f(x) = |x| + [x] where [x] is the greatest integer less than or equal to x, the value of f(-0.5) + f(2.5) is
a. -2
b. 2
c. 3
d. 4
e. -3
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
a. -2
b. 2
c. 3
d. 4
e. -3
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: If f(x) = |x| + [x] where [x] is the greatest integer less than or equ
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15 Mar 2021, 10:34
15 Mar 2021, 10:34
Carcass wrote:
If f(x) = |x| + [x] where [x] is the greatest integer less than or equal to x, the value of f(-0.5) + f(2.5) is
a. -2
b. 2
c. 3
d. 4
e. -3
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
a. -2
b. 2
c. 3
d. 4
e. -3
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
ASIDE---------------------
Let's make sure we understand what this [] symbol means.
Here are a few examples:
[3.1] = 3
[5.8] = 5
[0.7] = 0
[-0.9] = -1
[-4.6] = -5
--------------------------
So, [-0.5] = -1 and [2.5] = 2
So, f(-0.5) = |-0.5| + [-0.5]
= 0.5 + (-1)
And f(2.5) = |2.5| + [2.5]
= 2.5 + 2
This means: f(-0.5) + f(2.5) = [0.5 + (-1)] + [2.5 + 2] = 4
Answer: D
Cheers,
Brent
Re: If f(x) = |x| + [x] where [x] is the greatest integer less than or equ
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16 Apr 2024, 05:11
16 Apr 2024, 05:11
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Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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