1,3.5x—2(x+5)=8 2,(10—90+2x)÷2=75
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
解方程3x(5-3x)-36=2x(7-2x)+5x(8-x)
.2x(3x+1)=9x+3(x+8)(x+1)=12
解方程:x-19分之5x-96+x-9分之x-8=x-6分之4x-19+x-8分之2x-21
方程x+1x+2+x+8x+9=x+2x+3+x+7x+8
先化简,再求值:[(x-2/x²+2x)-(x-1/x²+4x+4)]÷﹙x-4/x+2﹚,其中x&
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),
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
7:x=14:(2+x)求x
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550