韦达定理:(X1+1/X2)(X2+1/X1)怎么解,
问题描述:
韦达定理:(X1+1/X2)(X2+1/X1)
怎么解,
答
=[(x1x2+1)/x2]*[(x1x2+1)/x1]
=(x1x2+1)²/x1x2
=(c/a+1)²/(c/a)