2x＋3=x-5,求x.

x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x 2x＋3=x-5,求x. 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!)+. (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? (x-2)(x*x-6x-9)=x(x-5)(x-3),求6x的算术平方根 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, 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) 3^x=2^x,求x.5^(x-1)·10^3x=8^x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 已知实数x满足5x*x-3x-5=0,求代数式5x*x-2x-[1/5x*x-2x-5]的值. 已知实数x满足5x*x-3x-5=0,求代数式5x*x-2x-1/5x*x-2x-5的值. 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 1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少 x-2/5x-(x-2/5x)2/3-(2/5x-1/3x)=30求x 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,