x=3/5=1-3/5 求x,

x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x x*x+3x+1 =5 求x 已知3x*x-x=1,求6x*x*x+7x*x-5x+2000 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!)+. 3^x=2^x,求x.5^(x-1)·10^3x=8^x求x (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? 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) (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 5x-3x=1 求x等于几? x-1/3x=4/5求x 2乘5^x=3^(x+1) 求x x-2/5x-(x-2/5x)2/3-(2/5x-1/3x)=30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. 数学f(x)=x(x+1)(x+2)(x+3)(x+4)(x+5),求f'(0)=? 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