4.8x+3=3.

4.8x+3=3. 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) x-o.8x=6 12x-8x=4.8 3x-8=16 7.5x-2x x-0.7x=3.6 求答案 X(X的2次方-6X-9)-X(X的2次方-8X-15)+2X(3-X),其中X=1/3. 先化简,再求值 x-3x-1.2=4.8-5x 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. 函数f(x)与g(x)相等.f(x)=x-1,g(x)=x^2/x-11.f(x)=x-1,g(x)=x^2/x-1 2.f(x)=x^2 g(x)=(根号x)四次方3.f(x)=x^2 g(x)=3根号x六次方 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!)+. 9x-4.8=3x 6x-3x=4.8 4.8-x=3{x-6} 3(X+4.8)=7X 3x-4*6=4.8+x 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)? 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) 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 2/3x+x/4=3. x+x^2+x^3+x^4+...+x^(n-1)=1/3..为无穷大.求X.