求数学题,40分~简便计算:2007^2-4012*2007+2006^2已知,x+y=6,xy=4,则x^2y+xy^2的值为___________已知:2^m=3,32^n=6,求2^3m-10n的值

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求数学题,40分~简便计算:2007^2-4012*2007+2006^2已知,x+y=6,xy=4,则x^2y+xy^2的值为___________已知:2^m=3,32^n=6,求2^3m-10n

求数学题,40分~简便计算:2007^2-4012*2007+2006^2已知,x+y=6,xy=4,则x^2y+xy^2的值为___________已知:2^m=3,32^n=6,求2^3m-10n的值
求数学题,40分~
简便计算:2007^2-4012*2007+2006^2
已知,x+y=6,xy=4,则x^2y+xy^2的值为___________
已知:2^m=3,32^n=6,求2^3m-10n的值

求数学题,40分~简便计算:2007^2-4012*2007+2006^2已知,x+y=6,xy=4,则x^2y+xy^2的值为___________已知:2^m=3,32^n=6,求2^3m-10n的值
2007^2-4012*2007+2006^2
=2007^2-2*2006*2007+2006^2
=(2007-2006)^2
=1
x^2y+xy^2
=xy(x+y)
=4*6
=24
2^(3m-10n)
=[2^(3m)]*2^(-10n)
=[(2^m)^3]*(32^n)^(-2)
=(3^3)*6^(-2)
=27*(1/36)
=3/4

简便计算:2007^2-4012*2007+2006^2
原式=2007²-2×2006×2007+2006²
=(2007-2006)²
=1
已知,x+y=6,xy=4,则x^2y+xy^2的值为___________
x^2y+xy^2=xy(x+y)=6×4=24
已知:2^m=3,32^n=6,求2^3m-10n的值
2^3m-10n=(2^m)³/(2^n)^10=(2^m)³/(32^n)^2=27/36=3/4

1.原式=(2007-2006)^2=1
2.x^2y+xy^2=xy(x+y)=24
3.32^n=6
2^(5n)=6
2^(10n)=36
2^m=3
2^(3m)=27
2^(3m-10n)=2^(3m)/2^(10n)=27/36=3/4

1.2007^2-2*2006*2007+2006^2=(2007-2006)^2=1
2.=xy(x+y)=24


2007^2-4012*2007+2006^2
=2007^2-(2007+2006)*2007+2006^2
=(2007-2006)*2006
=2006

x^2y+xy^2
=(x+y)x*y
=6*4=24

2^(3m-10n)
=2^3m/2^10n
=(2^m)^3/(2^5)^2n
=(2^m)^3/[(32)^n]^2
=3^3/6^2
=27/36
=3/4

1.2007^2-4012*2007+2006^2=(2007-2006)^2=1
2.∵x+y=6,xy=4,则x^2y+xy^2=xy(x+y)=24
3.∵2^m=3,32^n=6,则m=以2为底3的对数,
5n=以2为底6的对数=1+以2为底3的对数
2^3m-10n=8m-2×5n=8m-2(1+m)=6m-2=6以2为底3的对数-2.