Chủ đề:
Bài 4: Công thức nghiệm của phương trình bậc haiCâu hỏi:
cho phương trình:
x4 - 2x2 +m+2 = 0
tìm m để phương trình có 3 nghiệm phân biệt
Chọn từ có cách phát âm khác:
1. A bright B friendship C rumor D concern
2.A acquaintance B constancy C suspicious D uncertain
3.A relationship B enthusiasm C unselfishness D sympathenic
4A quality B interest C incapable D personal
5A pleasure B believe C pursuit D decribe
6.A affect B embrace C protect D happen
7A attitude B confidence C experience D memorable
8.A appreciate B embarrassment C conversation D discovery
9A outlook B complain C realize D cottage
10A imitate B diolague C personal D apartment
11.A household B secure C pressure D active
12A supportive B leftovers C confidence D hospital
13A mischievous B solution C obedient D important
14A biologist B reponsible C relationship D secondary
15A believe B attempt C garbage D discuss
16 A confine B maintain C oblige D certain
17A conical B sacrifice C approval D counterpart
18A diversity B traditional C attractiveness D generation
19A partnership B contractual C romantic D appearance
20A untrustworthy B military C particular D. significant
21A doctor B address C birthday D concert