360°÷11≈32 °44 ′
已知3x∧αy-(b+1)xy+1是关于x、y的三次二项式,则x^ay^1指数为3,a+1=3,a=2
(b+1)xy=0,b+1=0,b=-1
则ab=-1*2=-2
4(a²b-2ab²)-(a²b+3ab²)
=4a^2b-8ab^2-a^2b-3ab^2
=3a^2b-11ab^2
=ab(3a-11b)
若o<a<1则a,a分之1,-a,a²用<号连接起来应该是
-a1,
a-a^2=a(1-a)>0,1>a>a^2>0
所以:-a
360°÷11≈32 °44 ′
已知3x∧αy-(b+1)xy+1是关于x、y的三次二项式,则x^ay^1指数为3,a+1=3,a=2
(b+1)xy=0,b+1=0,b=-1
则ab=-1*2=-2
4(a²b-2ab²)-(a²b+3ab²)
=4a^2b-8ab^2-a^2b-3ab^2
=3a^2b-11ab^2
=ab(3a-11b)
若o<a<1则a,a分之1,-a,a²用<号连接起来应该是
-a1,
a-a^2=a(1-a)>0,1>a>a^2>0
所以:-a