♥10題數學問題]]*送你2o分`!(超急要的)有冇人識答呀

2010-09-01 1:52 am

o1. 計算 ( - 27 )^ (-2) x( -1/9 )^(-4) ÷ ( 3^(-2)^3
並以正數表示答案。

o2. 2^4x(-2)^2n-1
___________ 並以正數表示答案。
2(-2)^2n

化簡下列各數式

o3. (2a^-2b^4)x(ab^-1)^3 ÷ (2a)^-3 / a^3b^2

o4 . ( x^-1 - y^-1 )
__________
x^-2 - y^2

o5. b^n - b^n+3
___________
b^n

o6. 3^n+1 - 2x3^n
_____________
3^n-1

計算下列各題並以科學記數法表示答案。

o7. √49000000 x √64x10^-4

o8. 125x10^-5 + 0.4x10^-4

o9. 試運用2.3.4組合出兩條結果在0至10之間的算式。
( 注意 : 算式中必須包含一個指數 )

1o.化簡
3^+1-5x3^n
____________
3^n-2

回答 (2)

Xxx

2010-09-02 5:56 am

你想要的答案,我已經sd左比你了.

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Godfrey

2010-09-01 3:24 pm

You ask the same questions as 發問者：YyYy .
Are both of you attending the same class?
I have already done Question 1 to 8.
Please refer to the solutions over there.

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