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On a scale that measures the intensity of a certain phenomenon, a reading of n+1 corresponds to an intensity that is 10 times the intensity corresponding to a reading of n .On that scale ,the intensity corresponding to a reading of 8 is how many times as great as the intensity corresponding to a reading of 3?
(A) 5 (B) 50 (C)10的5次方
(D)5的10次方 (E) 8的10次方减去3的10次方
由于无法输入公式 将就看下吧~ 答案选C 不明白 题目条件意思是:n+1=10n 吗? |
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