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chapter3 sequences
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write down an expression, in term of n,for nth term of sequences
1)1/4,2/9,3/16,4,25,5/36 .........
2)1,-1/2,1/4,-1/8,1/16 ............ |
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发表于 22-4-2010 10:43 AM
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显示全部楼层
1)1/4,2/9,3/16,4,25,5/36 .........
n/(n+1)^2 where n=1,2,3.....
2)1,-1/2,1/4,-1/8,1/16 ............
(-0.5)^n where n=0,1,2.....
如果没有错，应该是这样。。。 |
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