作者chiehwj (W.W.J.D)
看板GRE_Verbal
标题Re: [计量] 11x13x17x19x23
时间Sun Feb 8 22:22:50 2009
※ 引述《sasaes (酷拉拉)》之铭言：
: 11x13x17x19x23
: a decrease of 1 in which of the factors
: above would result in the greatest decrease
: in the product？
: a)11 b)13 c)17
: d)19 e)23
: 拜托大家了！！谢谢～
let 11x13x17x19x23 = S
a): (11-1)x13x17x19x23 = S-13x17x19x23
b): 11x(13-1)x17x19x23 = S-11x17x19x23
c): 11x13x(17-1)x19x23 = S-11x13x19x23
d): 11x13x17x(19-1)x23 = S-11x13x17x23
e): 11x13x17x19x(23-1) = S-11x13x17x19
therefore, the answer is A.
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1F：推 sasaes :终於想通了！！非常感谢！！！ 02/08 22:47