中4數學題 求如何做

2014-01-29 11:32 pm
16n-1—16n+1 / 16n-1 請問這題數怎樣做

回答 (1)

2014-01-30 12:47 am
✔ 最佳答案
16n-1-(16n+1) / (16n-1)
=[(16n-1)²-(16n+1) ]/(16n-1)
=[256n²-32n+1-16n-1]/(16n-1)
=[256n²-48n]/(16n-1)
=[(16n-3)16n]/(16n-1)

2014-01-29 19:33:27 補充:
n≠1/16


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https://hk.answers.yahoo.com/question/index?qid=20140129000051KK00141

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