初中数学分式题:已知a*a-5a+1=0,求2a*a+5a+1/(a*a)将a的结果的详细求出过程写出(补充一下,我正在上初二,别用太高等的解法解)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 10:52:10
![初中数学分式题:已知a*a-5a+1=0,求2a*a+5a+1/(a*a)将a的结果的详细求出过程写出(补充一下,我正在上初二,别用太高等的解法解)](/uploads/image/z/1630406-38-6.jpg?t=%E5%88%9D%E4%B8%AD%E6%95%B0%E5%AD%A6%E5%88%86%E5%BC%8F%E9%A2%98%3A%E5%B7%B2%E7%9F%A5a%2Aa-5a%2B1%3D0%2C%E6%B1%822a%2Aa%2B5a%2B1%2F%28a%2Aa%29%E5%B0%86a%E7%9A%84%E7%BB%93%E6%9E%9C%E7%9A%84%E8%AF%A6%E7%BB%86%E6%B1%82%E5%87%BA%E8%BF%87%E7%A8%8B%E5%86%99%E5%87%BA%EF%BC%88%E8%A1%A5%E5%85%85%E4%B8%80%E4%B8%8B%EF%BC%8C%E6%88%91%E6%AD%A3%E5%9C%A8%E4%B8%8A%E5%88%9D%E4%BA%8C%EF%BC%8C%E5%88%AB%E7%94%A8%E5%A4%AA%E9%AB%98%E7%AD%89%E7%9A%84%E8%A7%A3%E6%B3%95%E8%A7%A3%EF%BC%89)
xRN@Bm~!HCICF;+~Cą]4{3@USpZ
Ffy[܃]<8(d,h凾M^LUʃd %Zh 73SO4FY51Kk$M$߁eHu}2 {OшUd*[j1ϱ%53b`,"~[K=͉zʐC^2-YJbcQ8+`iTwtgE`Oo><9"gqyq3p_o&gnRvrmҹg?O'
i-ڄ!dzz
O
初中数学分式题:已知a*a-5a+1=0,求2a*a+5a+1/(a*a)将a的结果的详细求出过程写出(补充一下,我正在上初二,别用太高等的解法解)
初中数学分式题:已知a*a-5a+1=0,求2a*a+5a+1/(a*a)
将a的结果的详细求出过程写出(补充一下,我正在上初二,别用太高等的解法解)
初中数学分式题:已知a*a-5a+1=0,求2a*a+5a+1/(a*a)将a的结果的详细求出过程写出(补充一下,我正在上初二,别用太高等的解法解)
a=正负根号10/2
2a*a+5a+1/(a*a)=2*(10/2)+5*正负根号10/2+2/10
=10+5*正负根号10/2+2/10
=102/10+5*正负根号10/2
完了!清楚哈!给分哈!
∵a²-5a+1=0的解为a=(-5±√21)÷2
∴a²=(23±5√21)÷2......①
2a²+5a+1/(a²)=2a²+5a+1/(a²)+0=2+a²5a+1/(a²)+[a²-5a+1]
=3a²+(1/a²)+1....②
将①代入②即可得到答案.