求文档:已知2x-1的算术平方根是3,3x+y-1的算术平方根是44,求x+2y的算术平方根
问题描述：
求文档:已知2x-1的算术平方根是3,3x+y-1的算术平方根是44,求x+2y的算术平方根
答
先求x 将x代入y,将x=2,y=39代入原式,
2x-1=3 3×2+y-1=44 √2+2×39=√80
x=2 y=39 =8√6