25^(x+1)-9*5^(x+2)+500=0
方程(x+1)(x+2)(x+3)(x+4)(x+5)(x+6)(x+7)(x^2+8x+9)+64=0
解方程 144x平方-9=0 2x平方+3x+1=0 x平方-7x+1=0 25-10x+x平方=5-x 4x平方-4x
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
已知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
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),
x+3/x+1-x+5/x+3-x+7/x+5+x+9/x+7=0
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(x+1)
(x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
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.