2道数学计算(1) :(a^2-a)^2-(a-1)^2(2) :已知x-y = -1,xy=3.求x^3y-2x^2y^2+xy^3的值第(2)个问题不要算!下面是同一题:改成:计算填空:3^3-4*3^2+10*3=___3^4-4*3^3+10*3^2=___3^5-4*3^4+10*3^3=___猜想下
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![2道数学计算(1) :(a^2-a)^2-(a-1)^2(2) :已知x-y = -1,xy=3.求x^3y-2x^2y^2+xy^3的值第(2)个问题不要算!下面是同一题:改成:计算填空:3^3-4*3^2+10*3=___3^4-4*3^3+10*3^2=___3^5-4*3^4+10*3^3=___猜想下](/uploads/image/z/1106997-69-7.jpg?t=2%E9%81%93%E6%95%B0%E5%AD%A6%E8%AE%A1%E7%AE%97%EF%BC%881%EF%BC%89+%EF%BC%9A%28a%5E2-a%29%5E2%EF%BC%8D%EF%BC%88a-1%29%5E2%EF%BC%882%EF%BC%89+%EF%BC%9A%E5%B7%B2%E7%9F%A5x-y+%3D+-1%2Cxy%3D3.%E6%B1%82x%5E3y-2x%5E2y%5E2%2Bxy%5E3%E7%9A%84%E5%80%BC%E7%AC%AC%EF%BC%882%EF%BC%89%E4%B8%AA%E9%97%AE%E9%A2%98%E4%B8%8D%E8%A6%81%E7%AE%97%EF%BC%81%E4%B8%8B%E9%9D%A2%E6%98%AF%E5%90%8C%E4%B8%80%E9%A2%98%EF%BC%9A%E6%94%B9%E6%88%90%EF%BC%9A%E8%AE%A1%E7%AE%97%E5%A1%AB%E7%A9%BA%EF%BC%9A3%5E3-4%2A3%5E2%2B10%2A3%3D___3%5E4-4%2A3%5E3%2B10%2A3%5E2%3D___3%5E5-4%2A3%5E4%2B10%2A3%5E3%3D___%E7%8C%9C%E6%83%B3%E4%B8%8B)
2道数学计算(1) :(a^2-a)^2-(a-1)^2(2) :已知x-y = -1,xy=3.求x^3y-2x^2y^2+xy^3的值第(2)个问题不要算!下面是同一题:改成:计算填空:3^3-4*3^2+10*3=___3^4-4*3^3+10*3^2=___3^5-4*3^4+10*3^3=___猜想下
2道数学计算
(1) :(a^2-a)^2-(a-1)^2
(2) :已知x-y = -1,xy=3.求x^3y-2x^2y^2+xy^3的值
第(2)个问题不要算!下面是同一题:
改成:计算填空:
3^3-4*3^2+10*3=___
3^4-4*3^3+10*3^2=___
3^5-4*3^4+10*3^3=___
猜想下列个题的结果并验证:
1.3^2004-4*3^2003+10*3^2002=_____
2.3^n+2-4*3^n+1+10*3^n=_____
2道数学计算(1) :(a^2-a)^2-(a-1)^2(2) :已知x-y = -1,xy=3.求x^3y-2x^2y^2+xy^3的值第(2)个问题不要算!下面是同一题:改成:计算填空:3^3-4*3^2+10*3=___3^4-4*3^3+10*3^2=___3^5-4*3^4+10*3^3=___猜想下
(1) (a^2-a)^2-(a-1)^2
=a^2(a-1)^2-(a-1)^2
=(a-1)^2(a^2-1)
=(a+1)(a-1)^3
(2)x^3y-2x^2y^2+xy^3
=x^2y(x-y)-xy^2(x-y)
=xy(x-y)(x-y)
=xy(x-y)^2
=3*(-1)^2
=3
3^3-4*3^2+10*3=3*7_=21__
3^4-4*3^3+10*3^2=_3^2*7=63__
3^5-4*3^4+10*3^3=_3^3*7=189__
猜想下列个题的结果并验证:
1.3^2004-4*3^2003+10*3^2002=_3^2002*7____
2.3^n+2-4*3^n+1+10*3^n=_3^n*7____
(a+1)(a-1)^3
3