Lim bn( n趋向无穷大) [( 1/ n2+1) + (2/ n2+1) +( 3/ n2+1) +.(2n/ n2+1 )]=?这里前N项和为什么=(2n+1)*2n/2?1+2+3+...+2N和1+2+3+...+N有什么不同啊我怎么确定这里到底有几项啊
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![Lim bn( n趋向无穷大) [( 1/ n2+1) + (2/ n2+1) +( 3/ n2+1) +.(2n/ n2+1 )]=?这里前N项和为什么=(2n+1)*2n/2?1+2+3+...+2N和1+2+3+...+N有什么不同啊我怎么确定这里到底有几项啊](/uploads/image/z/2260400-32-0.jpg?t=Lim+bn%28+n%E8%B6%8B%E5%90%91%E6%97%A0%E7%A9%B7%E5%A4%A7%29+%5B%EF%BC%88+1%2F+n2%2B1%EF%BC%89+%EF%BC%8B+%EF%BC%882%2F+n2%2B1%EF%BC%89+%EF%BC%8B%EF%BC%88+3%2F+n2%2B1%EF%BC%89+%EF%BC%8B.%EF%BC%882n%2F+n2%2B1+%EF%BC%89%5D%3D%3F%E8%BF%99%E9%87%8C%E5%89%8DN%E9%A1%B9%E5%92%8C%E4%B8%BA%E4%BB%80%E4%B9%88%3D%282n%2B1%29%2A2n%2F2%3F1%EF%BC%8B2%EF%BC%8B3%EF%BC%8B%EF%BC%8E%EF%BC%8E%EF%BC%8E%EF%BC%8B2N%E5%92%8C1%EF%BC%8B2%EF%BC%8B3%EF%BC%8B%EF%BC%8E%EF%BC%8E%EF%BC%8E%EF%BC%8BN%E6%9C%89%E4%BB%80%E4%B9%88%E4%B8%8D%E5%90%8C%E5%95%8A%E6%88%91%E6%80%8E%E4%B9%88%E7%A1%AE%E5%AE%9A%E8%BF%99%E9%87%8C%E5%88%B0%E5%BA%95%E6%9C%89%E5%87%A0%E9%A1%B9%E5%95%8A)
Lim bn( n趋向无穷大) [( 1/ n2+1) + (2/ n2+1) +( 3/ n2+1) +.(2n/ n2+1 )]=?这里前N项和为什么=(2n+1)*2n/2?1+2+3+...+2N和1+2+3+...+N有什么不同啊我怎么确定这里到底有几项啊
Lim bn( n趋向无穷大) [( 1/ n2+1) + (2/ n2+1) +( 3/ n2+1) +.(2n/ n2+1 )]=?
这里前N项和为什么=(2n+1)*2n/2?
1+2+3+...+2N和1+2+3+...+N有什么不同啊
我怎么确定这里到底有几项啊
Lim bn( n趋向无穷大) [( 1/ n2+1) + (2/ n2+1) +( 3/ n2+1) +.(2n/ n2+1 )]=?这里前N项和为什么=(2n+1)*2n/2?1+2+3+...+2N和1+2+3+...+N有什么不同啊我怎么确定这里到底有几项啊
这里前N项和为什么=(2n+1)*2n/2?
这句错了
这里前2N项和=(2n+1)*2n/2
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