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ENERGY USED PER METER VERSUS SPEED DURING RUNNING AND WALKING If n = 23, then nn=
ENERGY USED PER METER VERSUS SPEED DURING RUNNING AND WALKING If n = 23, then nn=
admin
2014-08-13
48
问题
ENERGY USED PER METER VERSUS SPEED
DURING RUNNING AND WALKING
If n = 2
3
, then n
n
=
选项
A、2
6
B、2
11
C、2
18
D、2
24
E、2
27
答案
D
解析
When answering a question in which you are asked to calculate the value of an expression, it is often helpful to look at the answer choices first to see what form they are in. In this question the answer choices are all in the form 2 raised to a power, so you should try to achieve that form. It is given that n=2
3
= 8. Therefore, n
n
=(2
3
)
8
= 2
24
. The correct answer is Choice D.
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