一元一次方程3(x-7)-2[9-4(2-x)]=22 X=15.42(x-2)-3(4x-1)=9(1-x) X=16
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
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
(4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(x+1)
1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980
1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少
x-4/5-(x-1)=x-3/3-x-2/2一元一次方程
2/x+3x=2/x-7和x²-4x=x(x-1)-3是不是一元一次方程?怎么判断?
1/x+x=2是不是一个一元一次方程?x/4+3=0是不是一个一元一次方程?