[計量] PP-PS1 #19

看板GMAT (GMAT入學考試)作者 (MiniWater)時間17年前 (2008/01/07 22:38), 編輯推噓0(000)
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For a finite sequence of nonzero numbers, the number of variations in sign is defined as the number of pairs of consecutive terms of the sequence for which the product of the two consecutive terms is negative. What is the number of variations in sign for the sequence 1, -3, 2, 5, -4, -6 ? (A) One (B) Two (C) Three (D) Four (E) Five 答案是(C) 為什麼呢 有點看不懂題目..Orz 麻煩各位高手了~謝謝 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 220.132.163.51
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