Simplify the expression.
3^n+1 - 3^n-1
-------------------
2*3^n
Maths!!F.3(Laws of Indices)!!
2009-09-07 4:05 am
回答 (1)
2009-09-07 4:09 am
✔ 最佳答案
3^n + 1 - 3^n - 1 = 3^n(3 - 1/3) = 3^n(8/3)so answer = 3^n(8/3)/2* 3^n = (8/3)/2 = 8/6 = 4/3.
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