若实数m.n.x.y满足m^2+n^2=a,x^2+y^2=b,其中a.b为常数,那么mx+ny的最大值为

若实数m,n,x,y满足m^2+n^2=a,x^2+y^2=b(a不等于b),mx+ny的最大值是 若实数x,y,m,n满足x^2+y^2=a,m^2+n^2=b,求mx+ny的取值范围 若实数m n 满足(m+n)(m+n-2)-8=0 则m+n=? 集合M满足x|x小于等于m,N满足y|y=x^2-2x,若M交N等于空集,m的取值范围 已知单项式M、N满足2x(M+3x)=6x^2y^2+N,求M、N. 已知单项式M,N满足3x(M-5x)=6x^2y^3+N,求M,N 已知,单项式M,N满足2x（M+3x)=6x²y²+N,求M,N 已知函数f(x)=log(2)(x-2),若实数m,n满足f(m)+f(2n)=3,则m+n的最小值为___ 已知f(x)=log2(x-2),若实数m,n满足f(m)+f(2n)=3,则m+n的最小值是______ 若单项式M,N满足2x（M+3x）=6*x*x*y*y+N,求M,N 设实数x,y,m,n满足x^2+y^2=3,m^2+n^2=1,求mx+ny的最大值． 设实数x,y,m,n满足x^2+y^2=3,m^2+n^2=1 ,则mx+ny的最大值为 已知实数x,y,m,n满足(x^2)+(y^2)=3,(m^2)+(n^2)=1,求mx+ny的最大值? 一道不等式最值问题实数m,n,x,y满足m^2+n^2=a,x^2+y^2=b,求mx+ny最大值 设实数x,y,m,n满足 x^2+y^2=1,m^2+n^2=1,则mx+ny的取值范围 已知向量m=(2,y),n=(x,1),且m垂直于n,则实数x,y满足关系式 已知实数x,y满足x^2+y^2=3(y>=0),若m=(y+1)/(x+3),n=2x+y,则m,n的取值范围是? 已知单项式M、N满足（6x^2y^3-M）/n=-2x+3,求M、N