|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
2-x/x²-9(1+2x-7/x²-4x+4)÷1/x+3
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
x-2/(x^2-9)(1+(2x-7/x^2-4x+4)÷(x+1)/(x+3)其中x=2010
x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)
2x+3x+4x+5x+x+6x+7x=100
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
x+2x-3x-4x+5x+6x-7x.-196x+197x+198x-199x-200x 等于多少
7x=2+3x 3.5x=28 5(x+8)-5=6(2x-7) 9(x-4)=7(4-x)
1.先化简再求值:(x+3 - 7/x-3)÷( x²/2x-6 - 4x-8/x-3),其中x=2^-3
已知两个函数f(x)=7x^2-28x-c,g(x)=2x^3+4x^2-40x
(2x^4-3x^3+6x^2+7x-4b)÷(x-2)怎么算?