.(2+2+5+x)÷4=5求x

x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? 已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10| 已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10) 如果1+x+x^2+x^3=0,求x+x^2+X^3+x^4+x^5+x^6+x^7+x^8的值, X+2=5-4求x (x+2)(x-1)+(x+3)(x+1)=x·x-1 求x (5x-4)(2x+5)(3x-6)(2x-4)=(2x-4)(2x+5)·0.5 求x 求x 5x^2+x-4=0 求y=(5x-1)/(4x+2) (x 4x+5/2x=10,求x 4(x+2)=16(x-5)求x (x-2)(x-4)-(x-1)(x-5)求过程 设x= -5/2,求6x+(x/x-2 - x/x+2)/4x/x^4-2x^3+8x-16的值 若x^3+x^2+x+1=0,求代数式1+x+x^2+x^3+x^4+x^5+...+x^2006+x^2007的值 数学f(x)=x(x+1)(x+2)(x+3)(x+4)(x+5),求f'(0)=? 已知x+x^2+x^3+x^4+x^5+x^6=4.4,求x 请解题, 若x+x^2+x^3+x^4=0.求x^5+x^6+…+x^2004的值 1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少