x+1/x=2+1/2的解为x1=2x,x2=1/2;x+1/x=3+1/3的解为x1=3,x2=1/3;求x+1/(x-1)=a+1/(a-1)的解,
问题描述:
x+1/x=2+1/2的解为x1=2x,x2=1/2;x+1/x=3+1/3的解为x1=3,x2=1/3;求x+1/(x-1)=a+1/(a-1)的解,
答
这个规律为,如果:
x+1/x=a+1/a
则它的解为
x1=a,x2=1/a
x+1/(x-1)=a+1/(a-1)
x-1+1/(x-1)=a-1+1/(a-1)
根据以上规律可得:
x-1=a-1或x-1=1/(a-1)
所以这个方程的解为:
x1=a ,x2=1/(a-1)+1
即:x1=a ,x2=a/(a-1)