[計量] PP-PS1
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
想請問這題該怎麼解~
謝謝
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推
08/24 16:17, , 1F
08/24 16:17, 1F
→
08/24 16:43, , 2F
08/24 16:43, 2F
推
08/24 16:44, , 3F
08/24 16:44, 3F
→
08/24 16:46, , 4F
08/24 16:46, 4F
→
08/24 16:46, , 5F
08/24 16:46, 5F
→
08/24 16:52, , 6F
08/24 16:52, 6F
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