考考你咯(2)设X=(√3-√2)÷(√3+√2)Y=(√3+√2)÷(√3-√2)求:XY÷(X·X+Y·Y)的值注:
考考你咯(2)设X=(√3-√2)÷(√3+√2)Y=(√3+√2)÷(√3-√2)求:XY÷(X·X+Y·Y)的值注:
若x>0,y>0,且√x(√x+√y)=3√y(√x+5√y),求(2x+2√xy+3y)/(x-√xy+y)的值.
已知x>0,y>0,且x-2√xy-15y=0,求(2x+√xy+3y)÷(x+√xy-y)的值
设√x(√x-√y)=√xy+3y,求2x+3√xy-y/3x-y的值.
已知√x+y-3+绝对值xy+x+y-2l =0求x/y+y/x的值(初一)
若x、y为整数,√x(√x+√y)=3√y(√x+5√y),试求2x+(√xy)+3y除以x+(√xy)+y
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
已知x>0,y>0,且x-2√xy-15y=0,求(x+(√xy)-y)分之2x+√xy+3y的值
已知实数x,y满足x²+(√2)y=√3,y²+(√2)x=√3,且x≠y,求x+y和xy的值.
设xy是有理数,且xy满足等式x+2y-√2y=17+4√2,试求(√x+y)的2009次方
1) 已知x=√3,y=-1,求x²+2y²-xy的值
已知:(x-y)²与√5x-3y-6互为相反数,求:√x²+2xy+y²的值