(1+0.228-0.21)x(0.228-0.221+0.2003)-(1+0.228-0.21+0.2003)x(0
X+1>0 X
若1+x+x*x+x*x*x=0,求x+x*x+x*x*x+.+x(2000次幂)
f x ={x(1-x)x≥0,x(1+x)x
提取公因式:已知x*x-5x+1=0 求x*x*x-4x*x-4x-1
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
当x>0时,(1+x)ln(1+x)>x
(x+2)(x-3)(x-6)(x-1)=0
lim(x->0)((2-x)/(3-x))^1/x
(x²-7x+12)(x²+x+1)>0,
5/x²+x-1/x²-x=0
(x+1)(x+2)0
几道求极限的高数题,lim1/x(tanπx/(2x+1)) x→∞lim x(x^x-1)x→0+lim(x^x^x-