2. 外语
  3. In the formula W=，integers P and tare positive constants. If w=2 when v=1 and if w=1/2 when v=64,then t=

In the formula W=，integers P and tare positive constants. If w=2 when v=1 and if w=1/2 when v=64,then t=

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问题 In the formula W=，integers P and tare positive constants. If w=2 when v=1 and if w=1/2 when v=64,then t=
选项 A、1
B、2
C、3
D、4
E、16
答案C
解析 It is given that w =  and w = 2 when v = 1. Because 1 raised to any positive power is 1, it follows that 2 = P. If w = 1/2 when v = 64, then

The correct answer is C.
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