sandy wrote:

If w is a non-positive integer, which of the following must be positive?

Indicate all possible values.

A. −3w

B. 2w + 10

C. w^4

D. w^0

E. −w + 0.5

Drill 4

Question: 7

Page: 294

There's a slight problem with answer choice D.

If we let w = 0 (a non-positive integer), then w^0 = 0^0 and 0^0 is not defined (see page 141 of the Official Guide to the GRE - 3rd edition)

If 0^0 is not defined, we cannot say that 0^0 is positive.

So, there's only answer correct answer: E

Cheers,

Brent

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Brent Hanneson – Creator of greenlighttestprep.com

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