初一找规律填空,急啊!1×2=1/3×1×2×3,1×2+2×3=1/3×2×3×4,1×2+2×3+3×4+4×5=1/3×4×5×6,... 根据以上规律,请猜想:1×2+2×3+3×4+...+n(n+1)(N为整数)=-------------很急啊,帮帮忙,答对的加50分啊,速
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![初一找规律填空,急啊!1×2=1/3×1×2×3,1×2+2×3=1/3×2×3×4,1×2+2×3+3×4+4×5=1/3×4×5×6,... 根据以上规律,请猜想:1×2+2×3+3×4+...+n(n+1)(N为整数)=-------------很急啊,帮帮忙,答对的加50分啊,速](/uploads/image/z/2616653-29-3.jpg?t=%E5%88%9D%E4%B8%80%E6%89%BE%E8%A7%84%E5%BE%8B%E5%A1%AB%E7%A9%BA%2C%E6%80%A5%E5%95%8A%211%C3%972%3D1%EF%BC%8F3%C3%971%C3%972%C3%973%2C1%C3%972%2B2%C3%973%3D1%EF%BC%8F3%C3%972%C3%973%C3%974%2C1%C3%972%2B2%C3%973%2B3%C3%974%2B4%C3%975%3D1%EF%BC%8F3%C3%974%C3%975%C3%976%2C...++++%E6%A0%B9%E6%8D%AE%E4%BB%A5%E4%B8%8A%E8%A7%84%E5%BE%8B%2C%E8%AF%B7%E7%8C%9C%E6%83%B3%EF%BC%9A1%C3%972%2B2%C3%973%2B3%C3%974%2B...%2Bn%28n%2B1%EF%BC%89%EF%BC%88N%E4%B8%BA%E6%95%B4%E6%95%B0%EF%BC%89%3D-------------%E5%BE%88%E6%80%A5%E5%95%8A%2C%E5%B8%AE%E5%B8%AE%E5%BF%99%2C%E7%AD%94%E5%AF%B9%E7%9A%84%E5%8A%A050%E5%88%86%E5%95%8A%2C%E9%80%9F)
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初一找规律填空,急啊!1×2=1/3×1×2×3,1×2+2×3=1/3×2×3×4,1×2+2×3+3×4+4×5=1/3×4×5×6,... 根据以上规律,请猜想:1×2+2×3+3×4+...+n(n+1)(N为整数)=-------------很急啊,帮帮忙,答对的加50分啊,速
初一找规律填空,急啊!
1×2=1/3×1×2×3,1×2+2×3=1/3×2×3×4,1×2+2×3+3×4+4×5
=1/3×4×5×6,...
根据以上规律,请猜想:1×2+2×3+3×4+...+n(n+1)(N为整数)=-------------
很急啊,帮帮忙,答对的加50分啊,速度!
初一找规律填空,急啊!1×2=1/3×1×2×3,1×2+2×3=1/3×2×3×4,1×2+2×3+3×4+4×5=1/3×4×5×6,... 根据以上规律,请猜想:1×2+2×3+3×4+...+n(n+1)(N为整数)=-------------很急啊,帮帮忙,答对的加50分啊,速
1/3 * n(n+1)(n+2)
来得及吗?
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