2x^2-7x+2=0 求x+1/x
问题描述:
2x^2-7x+2=0 求x+1/x
答
等式两边同除以2x
x -(7/2) +1/x=0
x+1/x=7/2
2x^2-7x+2=0 求x+1/x
等式两边同除以2x
x -(7/2) +1/x=0
x+1/x=7/2