問 數學1條....(急!!)

2006-11-26 10:37 pm
(-5既3次方) + 2既3次方 x (-2分之3既3次方)

回答 (7)

2006-11-26 10:40 pm
✔ 最佳答案
-5^3+2^3+(-2/3)^3
=-125+8-8/27
=-117又8/27

2006-11-26 14:41:53 補充:
如果-2分之3係指 -3/2 既話-5^3 2^3 (-3/2)^3=-125 8-27/8=-120又3/8
2006-11-27 12:32 am
(-5^3) + 2^3 x (-2分之3^3)
=-125 + 8 x (-27分之8)
=-117 x (-27分之8)
=3159分之8
=394.875
2006-11-26 10:52 pm
-5既3次方=(-5)*(-5)*(-5)= -125
2既3次方=2*2*2=8
-2分之3既3次方=(-2/3)*(-2/3)*(-2/3)= -8/27

(-5既3次方) + 2既3次方 x (-2分之3既3次方)
= -125+8*(-8/27)
= -125+(-64/27)
= -127又10/27
2006-11-26 10:44 pm
-125+8x-8/27
=34.7(corr.to.i decimal place)
2006-11-26 10:44 pm
(-5既3次方) + 2既3次方 x (-2分之3既3次方)
= -125 + 8 x -8/27
= -125 + -64/27
= -127/10/27
(應該係敢...)

2006-11-26 14:47:43 補充:
sor....應該係(-5既3次方) + 2既3次方 x (-2分之3既3次方)= -125 + (8 x -27/8)= -125 + (-27)= -125 - 27= -98
參考: 自己
2006-11-26 10:43 pm
-110+-8x+8
=-110+-64
=-174
2006-11-26 10:43 pm
答案等於: -125

2006-11-26 14:44:49 補充:
講錯.係-152


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