x-3/0.15-x+4/0.2=1.感激不尽!0.15分之x-3 减去 0.2分之x+4 =1.6 这题x=24.96

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) f(x)=x+1.当x≥3,f(x)=4-x,当x x-3/0.15-x+4/0.2=1.感激不尽!0.15分之x-3 减去 0.2分之x+4 =1.6 这题x=24.96 一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 1.已知：x+y=0.2,x+3y=1,求3x^2+12xy+12y^2的值.2.化简：（1） (x^2-6x+9)/(x^2-4)（2） (x^2-4x)/(x^2-8x+16)3.解方程:(1) 1/(x-4)=4/(x^2-16)(2) 3/(x-1)-(x+2)/[x(x-1)]=0(3) (2-x)/(x-3)+1/(3-x)=1如果过程写得好, 1.(x*2-3x+3)/(x*2-3x+2)-(x*2-5x+7)/(x*2-5x+6)-1/(x*2-4x+3)2.1/x(x+1)+2/(x+1)(x+3)+3/(x+3)(x+6) 3.已知：x*2-3x+1=0,求x*2+1/x*2. (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) x-2x+3x-4x+5x.+99x-100x=25求解 2x+3x+4x+5x+x+6x+7x=100 x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x 0.2(x+6)=3/7(x-8)-x/4 快进来!1.x+4/0.2-x-3/0.5=-1.3 2.2x-1/2-2x+5/3=10x-17/4+1 3.0.3-30x/0.1.x+4/0.2-x-3/0.5=-1.32.2x-1/2-2x+5/3=10x-17/4+13.0.3-30x/0.3-6.5=3（5-2x）/0.05=-11/24.x=1+x/2+x/4+x/8+x/16 X+X+X+(X-1)+(X-2)+(X-3)+(X-4)=10(X-3)+(X-4) 0.5X-0.15=3/4-x 下列式子求导1.f(x)=x^3-3x^2+3x-22.g(x)=-3x^3+5x^2-4x+113.u(x)=-x^3+27x+74.h(x)=42-45x-3x^2+3x^35.f(x)=Lnx+x6.g(x)=x/(2+x^2) x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002