1/3,-1/8,1/15,-1/24,1/35,-1/48怎样找规律

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1/3,-1/8,1/15,-1/24,1/35,-1/48怎样找规律1/3,-1/8,1/15,-1/24,1/35,-1/48怎样找规律1/3,-1/8,1/15,-1/24,1/35,-1/48

1/3,-1/8,1/15,-1/24,1/35,-1/48怎样找规律
1/3,-1/8,1/15,-1/24,1/35,-1/48
怎样找规律

1/3,-1/8,1/15,-1/24,1/35,-1/48怎样找规律
第n个,n为奇数,1/(n+1)平方-1;
第n个,n为偶数,-1/(n+1)平方-1;