Re: [計量] 11x13x17x19x23
※ 引述《sasaes (酷拉拉)》之銘言：
: 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
: 拜託大家了！！謝謝～
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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02/08 22:47, , 1F
02/08 22:47, 1F
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