4.P:x^2-(3a-1)x+(2a^2-a)
问题描述:
4.P:x^2-(3a-1)x+(2a^2-a)
答
a2a-1
因为aa
a+1>2a
a>2a-1
4.P:x^2-(3a-1)x+(2a^2-a)
a2a-1
因为aa
a+1>2a
a>2a-1