5x+6.3x=3.

5x+6.3x=3. 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道简单的分式方程,1.3/(1-x^) = 2/(1+2x+x) - 5/1-2x+x^2.5x/(x^+x-6) + (2x-5)/(x^-x-12) = (7x-10)/(x^-6x+8)3.(x+1)/(x+2) + (x+6)/(x+7) = (x+2)/(x+3) + (x+5)/(x+6) 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-三分之一x-四分之一x(x-三分之一x)=5 f(x-3)=x*x-5x+3.求f(x)和f(e的x平方)?是这样的f(x-3)=x*x-5x+3.求f(x)和f(e^x)? x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 计算：1.6x-1/3x+2=5x-7/2x-5 2.2x/x-1=2/x+2=2 3.x-1/x+1-x/x-1=4/x²-1 1.f(x)=x(x^2+1/x+1/x^3) 2.f(x)=(e^x+Inx)/x 3.f(x)=sinx(cosx+2^x) 4.f(x)=5log2(2x+1) 已知x-x-1=0,证明.x=2x+1,x的五次方=5x+3. 化简求值 x/x-5+50/25-x^-x+1/5+x,其中x=3. 1.x+9/x+8- x+10/x+9=x+6/x+5- x+7/x+6；2.x³+2/x²-x+1+ x³-9/x²+2x+4=2x-1；3.x-a-b/c+ x-b-c/a+ x-c-a/b=3.（空开的指另一个分式）第二题不用了。 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 x-2x+3x-4x+5x.+99x-100x=25求解 x.x-5x+1=0,那么x.x+1/x.x 2x+3x+4x+5x+x+6x+7x=100 x(x-2)-2x(x+1)-3x(x-5) 其中x=负½