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03 Jan 2023, 11:00
Kudos
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
63% (01:44) correct
37%
(01:37)
wrong
based on 229
sessions
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Not Attempted Yet
As x decreases from 100 to 99, which of the following must decrease ?
I. 5x-12
II. (x+1)/x
III. 1/(x^3-x)
A. I Only
B. II Only
C. III Only
D. I and II
E. I and III
I. 5x-12
II. (x+1)/x
III. 1/(x^3-x)
A. I Only
B. II Only
C. III Only
D. I and II
E. I and III
03 Jan 2023, 11:06
Kudos
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Bunuel
I. 5x-12
The term is directly proportional to x, hence the decrease in the value of x will decrease the value of 5x-12
II. (x+1)/x
\(1 + \frac{1}{x} \)
The term is in-directly proportional to x, hence the decrease in the value of x will increase the value of (x+1)/x
II. 1/(x^3-x)
\(\frac{1}{x(x^2-1)}\)
\(\frac{1}{x(x+1)(x-1)}\)
The term is in-directly proportional to x, hence the decrease in the value of x will increase the value of 1/(x^3-x)
Option A
14 Nov 2025, 03:50
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I misinterpreted the 3rd one
III. 1/(x^3-x) as 1/(x^(3-x))
III. 1/(x^3-x) as 1/(x^(3-x))
