简单的数学题、希望广大人民群众帮忙1*2+2*3+……+100*101=?1*2+2*3+3*4+……+n*(n+1)=?1*2*3+2*3*4+……+n(n+1)(n+2)=?只需写结果,不需写过程.7的100次幂—1的末位数字是?1+3+5+……+2000=?已知代数式x+【(2
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![简单的数学题、希望广大人民群众帮忙1*2+2*3+……+100*101=?1*2+2*3+3*4+……+n*(n+1)=?1*2*3+2*3*4+……+n(n+1)(n+2)=?只需写结果,不需写过程.7的100次幂—1的末位数字是?1+3+5+……+2000=?已知代数式x+【(2](/uploads/image/z/2503320-24-0.jpg?t=%E7%AE%80%E5%8D%95%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%E3%80%81%E5%B8%8C%E6%9C%9B%E5%B9%BF%E5%A4%A7%E4%BA%BA%E6%B0%91%E7%BE%A4%E4%BC%97%E5%B8%AE%E5%BF%991%2A2%2B2%2A3%2B%E2%80%A6%E2%80%A6%2B100%2A101%3D%3F1%2A2%2B2%2A3%2B3%2A4%2B%E2%80%A6%E2%80%A6%2Bn%2A%28n%2B1%29%3D%3F1%2A2%2A3%2B2%2A3%2A4%2B%E2%80%A6%E2%80%A6%2Bn%28n%2B1%29%EF%BC%88n%2B2%EF%BC%89%3D%3F%E5%8F%AA%E9%9C%80%E5%86%99%E7%BB%93%E6%9E%9C%2C%E4%B8%8D%E9%9C%80%E5%86%99%E8%BF%87%E7%A8%8B.7%E7%9A%84100%E6%AC%A1%E5%B9%82%E2%80%941%E7%9A%84%E6%9C%AB%E4%BD%8D%E6%95%B0%E5%AD%97%E6%98%AF%3F1%2B3%2B5%2B%E2%80%A6%E2%80%A6%2B2000%3D%3F%E5%B7%B2%E7%9F%A5%E4%BB%A3%E6%95%B0%E5%BC%8Fx%2B%E3%80%90%EF%BC%882)
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