y=4x²-8x+1 X∈〖-2,4〗求最值

y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1 已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y 9y=3x-(x-1),4(x+y)-(2x+4)=8y 已知x²+y²+5=2x+4y,求代数式（2x²-（x+y)(x-y))x((x+y-1) (3)(4x-2y)-[5x-(8y-2x-y)]+x (4)-(2x²-3x-1)-2(x²-3x 1/4(-4x²+2x-8y)-(-x-2y)其中x=1/2 y=2008 【（2x+y）²-y(y+4x)-8x】÷2x,其中x=100 y=2x^2-4x-8 y=0.5x^2+2x-1 [(y-2x)(-2x-y)-4(x-2y)²]*2y,其中x=1,y=2 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 已知4x=9y求(1)x+y/y (2)y-x/2x 已知集合A={(x,y)|(y-2)/(x-1)=a+2,x,y∈R},B={(x,y)|(a²-4)x+(a