求(a+b)^5拜托各位了 3Q(a+b)^1=a+b (a+b)^2=a^2+2ab+b^2 (a+b)^3=a^3+3a^2b+3ab^2+b^3 (a+b)^4=a^4+4a^3b+6a^2b^2+4ab^3+b^4 根据前各式规律,则(a+b)^5=?你能帮我总结规律吗?
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![求(a+b)^5拜托各位了 3Q(a+b)^1=a+b (a+b)^2=a^2+2ab+b^2 (a+b)^3=a^3+3a^2b+3ab^2+b^3 (a+b)^4=a^4+4a^3b+6a^2b^2+4ab^3+b^4 根据前各式规律,则(a+b)^5=?你能帮我总结规律吗?](/uploads/image/z/6942767-23-7.jpg?t=%E6%B1%82%EF%BC%88a%2Bb%29%5E5%E6%8B%9C%E6%89%98%E5%90%84%E4%BD%8D%E4%BA%86+3Q%28a%2Bb%29%5E1%3Da%2Bb+%28a%2Bb%29%5E2%3Da%5E2%2B2ab%2Bb%5E2+%28a%2Bb%29%5E3%3Da%5E3%2B3a%5E2b%2B3ab%5E2%2Bb%5E3+%28a%2Bb%29%5E4%3Da%5E4%2B4a%5E3b%2B6a%5E2b%5E2%2B4ab%5E3%2Bb%5E4+%E6%A0%B9%E6%8D%AE%E5%89%8D%E5%90%84%E5%BC%8F%E8%A7%84%E5%BE%8B%2C%E5%88%99%EF%BC%88a%2Bb%29%5E5%3D%3F%E4%BD%A0%E8%83%BD%E5%B8%AE%E6%88%91%E6%80%BB%E7%BB%93%E8%A7%84%E5%BE%8B%E5%90%97%3F)
求(a+b)^5拜托各位了 3Q(a+b)^1=a+b (a+b)^2=a^2+2ab+b^2 (a+b)^3=a^3+3a^2b+3ab^2+b^3 (a+b)^4=a^4+4a^3b+6a^2b^2+4ab^3+b^4 根据前各式规律,则(a+b)^5=?你能帮我总结规律吗?
求(a+b)^5拜托各位了 3Q
(a+b)^1=a+b (a+b)^2=a^2+2ab+b^2 (a+b)^3=a^3+3a^2b+3ab^2+b^3 (a+b)^4=a^4+4a^3b+6a^2b^2+4ab^3+b^4 根据前各式规律,则(a+b)^5=?你能帮我总结规律吗?
求(a+b)^5拜托各位了 3Q(a+b)^1=a+b (a+b)^2=a^2+2ab+b^2 (a+b)^3=a^3+3a^2b+3ab^2+b^3 (a+b)^4=a^4+4a^3b+6a^2b^2+4ab^3+b^4 根据前各式规律,则(a+b)^5=?你能帮我总结规律吗?
(a+b)^n=C(n,0)a^n+C(n,1)a^(n-1)*b+C(n,2)a^(n-2)*b^2+...+C(n,n)b^n C(i,j)是排列数 这实际就是二项式定理,请参考 http://baike.baidu.com/view/392493.htm?fr=ala0_1_1