why負負得正
回答 (7)
2009-09-18 4:25 am
✔ 最佳答案
從中文角度，句子: 你不可以不上學。
意思係 你唔可以唔番學，即是你一定要上學。
"唔可以唔"有2個唔 (負負) 變成正。
亦即"雙重否定，表示肯定"。
2009-09-18 2:57 am
Lets take example 5 x 13 = 65.
5 = 6 - 1
13 = 14 - 1,
so 5 x 13 = (6 - 1) x ( 14 - 1).
By Distributive Law,
(6 - 1) x ( 14 - 1) = (6)(14) + (6)(-1) + (-1)(14) + (-1 x - 1)
= 84 - 6 - 14 + ( -1 x - 1) = 64 + ( - 1 x -1).
That means 64 + (- 1 x -1) = 65
therefore, - 1 x -1 = + 1.
5 = 6 - 1
13 = 14 - 1,
so 5 x 13 = (6 - 1) x ( 14 - 1).
By Distributive Law,
(6 - 1) x ( 14 - 1) = (6)(14) + (6)(-1) + (-1)(14) + (-1 x - 1)
= 84 - 6 - 14 + ( -1 x - 1) = 64 + ( - 1 x -1).
That means 64 + (- 1 x -1) = 65
therefore, - 1 x -1 = + 1.
2009-09-18 12:51 am
i can not say y
no answer
i ask u
y e=e???
it is because the ancestors says so!!>.<
hope i can help u la
no answer
i ask u
y e=e???
it is because the ancestors says so!!>.<
hope i can help u la
2009-09-18 12:43 am
負負得正就是負負得正
中國人有句話-----物极必反
你的發問看似淺白 , 但很有深度 , 加油
中國人有句話-----物极必反
你的發問看似淺白 , 但很有深度 , 加油
2009-09-18 12:39 am
這是Matha的定律,就如1x1=1,2x2=4,沒有解答的
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