9(4的n次)-3(2的n+1次)
__________________
5(2的n-1次)
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MATHs..指數
2007-03-11 2:38 am
回答 (2)
2007-03-11 6:38 am
✔ 最佳答案
9(4的n次)-3(2的n+1次)__________________
5(2的n-1次)
等於
9(2的2n次)-3(2的n+1次)
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5(2的n-1次)
等於
9 (2的n次) (2的n次)-3(2的n+1次)
__________________
5(2的n-1次)
等於
9 (2) (2的n-1次) (2的n次)-3(2) (2) (2的n-1次)
__________________
5(2的n-1次)
等於
9 (2) (2的n次)-3(2) (2)
__________________
5
等於
18 (2的n次)-12
__________________
5
2007-03-14 7:42 am
very good....
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