If x is an integer and y= 2 power -x , is y < 1/8 ?
(1) x = 4
(2) x > 2
Please explain the answer.
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Inequality and data suffiency
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Statement 1: As we know the value of x, we can determine the value of y and answer the question in either YES or NO.btgsnt wrote:If x is an integer and y = 2^(-x), is y < 1/8?
(1) x = 4
(2) x > 2
Sufficient
Statement 2: Consider the following two examples,
- x = 3, y = 2^(-3) = 1/[2^3] = 1/8 ---> NO
x = 4, y = 2^(-4) = 1/[2^4] = 1/16 < 1/8 ---> YES
The correct answer is A.
Anju Agarwal
Quant Expert, Gurome
Backup Methods : General guide on plugging, estimation etc.
Wavy Curve Method : Solving complex inequalities in a matter of seconds.
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Quant Expert, Gurome
Backup Methods : General guide on plugging, estimation etc.
Wavy Curve Method : Solving complex inequalities in a matter of seconds.
§ GMAT with Gurome § Admissions with Gurome § Career Advising with Gurome §
