50%x+1/4X(120-x)=4O.5
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
提取公因式:已知x*x-5x+1=0 求x*x*x-4x*x-4x-1
再问两道高数题一,证明o(kx^n)=o(x^n)二,已知x->4a时f(x)/(x-4a)=1,x->2a时f(x)/
已知f(x)=2X十|,X≥O;X^2十4,x
6x'2-7x+1=o;5x'2-18=9x;4x'2-3x=52;5x'2=4-2x.
实数X,Y满足X大于等于Y大于等于1和2X平方-xy-5x+y+4=o,则x+y的值
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
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),
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
(4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(x+1)
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8