求圆（x-5)^2+y^2=16绕x轴旋转一周生成的旋转体的体积.（用定积分求旋转体的体积） 2求圆（x-5)^2+y^2=16绕x轴旋转一周生成的旋转体的体积.（用定积分求旋转体的体积）2012-03-18 |

已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 求(X+Y)(X-Y)(X²+Y²),X=5 Y=2, (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) y=-2x+4 5y-2x=-16求x y 已知2/y-5/x=16,5/y+6/x=13,求x、y. x*x+4y*y+2x*x-4y+2=0求根号下5x*x+16y*y的值快啊 {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? x*x+y*y-2x+4y+5=0求x, 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值 1.log2(x)=log4(x),求x2.2^x=5^y,求x/y 5X+Y=3 X+5Y=2 求x和y.5X+Y=3X+5Y=2求x和y. 若x*x+4*y*y+2*x-4*y+2=0,求5*x*x+16*y*y的算术平方跟 求y=(5x-1)/(4x+2) (x 求y=2x+5/x-29（x y=x^3-5x^2+2x-8 求y^2求y撇 6x+5Y=31 2X+3Y=17求X求 Y 求dy/dx=(x-y+5)/(x+y-2) x>5/4,求函数y=(16x^2-28x+11)/4x-5