两道解分式方程的题~~1. [2(x^2+1)]/(x+1)+[6(x+1)]/(x^2+1)=72. x^4/(x^2+2x+1)-3x^2/(x+1)+2=0过程尽量详细些啊,谢谢!

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两道解分式方程的题~~1.      [2(x^2+1)]/(x+1)+[6(x+1)]/(x^2+1)=72.      x^4/(x^2+2x+1)-3x^2/(x+1)+2=0过程尽量详细些啊,谢谢!
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两道解分式方程的题~~1. [2(x^2+1)]/(x+1)+[6(x+1)]/(x^2+1)=72. x^4/(x^2+2x+1)-3x^2/(x+1)+2=0过程尽量详细些啊,谢谢!
两道解分式方程的题~~
1. [2(x^2+1)]/(x+1)+[6(x+1)]/(x^2+1)=7
2. x^4/(x^2+2x+1)-3x^2/(x+1)+2=0
过程尽量详细些啊,谢谢!

两道解分式方程的题~~1. [2(x^2+1)]/(x+1)+[6(x+1)]/(x^2+1)=72. x^4/(x^2+2x+1)-3x^2/(x+1)+2=0过程尽量详细些啊,谢谢!
令(x^2+1)/(x+1)=a
2a+6/a=7
2a^2-7a+6=0
a=2或a=3/2
(x^2+1)/(x+1)=3/2
3x+3=2x^2+2
2x^2-3x-1=0
x=(3+√17)/4或x=(3-√17)/4
(x^2+1)/(x+1)=2
x^2-2x-1=0
x=1+√2或x=1-√2
经检验,他们都是原方程的根
所以x=(3+√17)/4或x=(3-√17)/4或x=1+√2或x=1-√2
x^4/(x^2+2x+1)=x^4/(x+1)^2=[x^2/(x+1)]^2
令a=x^2/(x+1)
a^2-3a+2=0
a=1,a=2
x^2/(x+1)=1
x^2-x-1=0
x=(1+√5)/2或x=(1-√5)/2
x^2/(x+1)=2
x^2-2x-2=0
x=1+√3或x=1-√3
经检验,他们都是原方程的根
所以x=(1+√5)/2或x=(1-√5)/2或x=1+√3或x=1-√3

呵呵,我会解,可不会把公式写到上面