设a,b,x,y满足ax+by=3,ax2+by2=7,ax3+by3=16,ax4+bx4=42,求ax5+by5=?对了，例如ax5是表示ax^5

设x、y、a、b满足a2+b2+x2+y2=3,求ax+by的最大值 若a,b,x,y满足ax+by=3,ax^2+by^2=7,ax^3+by^3=16,ax^4+by^4=42,求ax^5+by^5的值 若a,b,x,y满足ax+by=3,ax^2+by^2=7,ax^3+by^3=16,ax^4+by^4=42,求ax^5+by^5的值 若a,b,x,y满足ax+by=3,ax+by=7,ax+by=16,ax的四次方+by的四次方=42,求ax的五次方+by的五次方的值 设实数a.b.x.y满足a^2+ b^2=1,x^2 +y^2=3,则ax +by的最大值是多小 设实数a,b,x,y满足a²+b²=1,x²+y²=3,则ax+by的最大值为 设实数a、b、x、y满足A方+B方=1,x方+y方=3,则ax+by的最大值 设函数a,b,x,y满足a^2+b^2=1,x^2+y^2=3,则ax+by的取值范围为： 设实数a,b,c ,d 满足a^2+b^2=1,x^2+y^2=3,则ax+by的取值范围 ：设ax+by=7,ax^2+by^2=49,ax^3+by^3=133,ax^4+by^4=406试求：1995(x+y)+6xy-(17/2)(a+b)的值 若a,b,x,y满足ax+by=3,ax^2+by^2=7,ax^3+by^3,ax^4+by^4=42,求ax^5+by^5的值.将8a^2-2ab-3b^2化为两个多项式的平方差.Sorry``的确少了··ax^3+by^3=16 设x,y满足条件3x-y-6=0,x>=0y>=0,若目标函数z=ax+by(a>0,b>0)的最大值为12,则2/a+3/b的最小值 设x,y满足约束条件：3x-y-6=0,x>=0,y>=0,若目标函数z=ax+by（a>0,b>0)最大值为12,求2/a+3/b的最小值. 设x,y满足约束条件3x-y-6=0,x>=0,y>=0 若目标函数Z=ax+by（a>0,b>0)的最大值为8 则1/a+2/b的最小值为 设x,y,满足约束条件x+y-2≥3,x-y≥-1,2x-y≤3,若目标函数z=ax+by的最大值为10,则5/a+4/b的最小值为 实数a,b,x,满足ax+by=3,ax^2+by^2=7,ax^3+by^3=16,ax^4+by^4=42,ax^5+by^5=? 设a,b,x,y满足ax+by=3,ax2+by2=7,ax3+by3=16,ax4+bx4=42,求ax5+by5=?对了，例如ax5是表示ax^5 已知实数abxy满足ax+by=3,ay-bx=5已知实数a,b,x,y满足ax+by=3,ay-bx=5,则（a^2+b^2）(x^2+y^2)的值是多少