數學(Help)2

2007-10-07 2:29 am

/ 代表分數線
X=2abc/a+b+c
若:a=1、b=-3、c=-5
求X

更新1:

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回答 (3)

2007-10-07 2:37 am

X=2abc/a+b+c

若:a=1、b=-3、c=-5

X=2 (1) (3) (-5) / (1+ 3 - 5)

X=6 (-5) / (4 - 5)

X= - 30 / ( -1 )

X=30

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2007-10-07 2:36 am

X=2abc/a+b+c

X=2(1)(-3)(-5)/1-3-5

X=30/7

2007-10-06 18:37:38 補充：
真正答案!!!!!

參考: ME

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2007-10-07 2:33 am

X=2abc/a+b+c
X=2(1)(-3)(-5)/(1) + (-3) + (-5)
X=30 + (-8)
X=22

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