5X+16X= Y+9Y= X+7X-4X=

5X+16X= Y+9Y= X+7X-4X= 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 y=|-x.x+4x+5| 7x:4y,x:y=( ):( 5x-4y(y-x)=? 初二上学期方程题 4x+y=5 5x+4y=63x-2y=1 2x+3y=13x-2y=7 7x+5y=32x+3y=17 2x-y=-4x+5y=6 2x+y=23x-6y=4 3x+2y=52x+y=73x-4y=53x+y=1x-2y=-1x+y=42x+3y=92x-3y=74x+5y=3x+y=20004x+6y=90003x+5y=113x-2y=42x+3y=215x-2y=5x+y=54x+3y=182x+3y=16x+4y=132x+3y=40x 解下列方程组{4x-3y=5 2x+5y=9 {x+y=2 x-y=0 {x+2y=6 x-2y=-2 {5x-y=16 3x+2y=20 {2x+3y=-7 3x+2y=7 用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+. 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 x-y+5x-4x= ?x-y+5x-4x= ? 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 联立方程 有的话 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y怎么解 y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 导数的计算练习题导数的计算（1）y=x^5 （2)y=sinx(3)y=1/x^3(4)y=5^√x(5)y=cosx(6)y=5^x(7)y=log3^x(8)y=lnx(9)f(x)=x^3-x^2-x+1(10)y=2x^3-3x^2+4x-1(11)y=x inx（12）y=xsinx-cosx(13)y=cosx/x(14)y=3x(x^2+2)(15)f(x)=(x-1)^2+3(x-1)(16)f(x)=1