Mn làm hộ e bài 2 với cần gấp ạ
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Bài 5:
f(x) có 1 nghiệm x - 2
=> f (2) = 0
\(\Rightarrow a.2^2-a.2+2=0\)
\(\Rightarrow4a-2a+2=0\)
=> 2a + 2 = 0
=> 2a = -2
=> a = -1
Vậy:....
P/s: Mỗi lần chỉ đc đăng 1 câu hỏi thôi! Bạn vui lòng đăng bài hình trên câu hỏi khác nhé!
a)Ta có △MIP cân tại M nên ˆMNI=ˆMPIMNI^=MPI^
Xét △MIN và △MIP có:
ˆNMI=ˆPMINMI^=PMI^
MI : cạnh chung
ˆMNI=ˆMPIMNI^=MPI^
Nên △MIN = △MIP (c.g.c)
b)Gọi O là giao điểm của EF và MI
Vì △MNP là tam giác cân và MI là đường phân giác của △MIP
Suy ra MI đồng thời là đường cao của △MNP
Nên ˆMOE=ˆMOF=90oMOE^=MOF^=90o
Xét △MOE vuông tại O và △MOF vuông tại O có:
OM : cạnh chung
ˆEMO=ˆFMOEMO^=FMO^(vì MI là đường phân giác của △MIP và O∈∈MI)
Suy ra △MOE = △MOF (cạnh góc vuông – góc nhọn kề)
Nên ME = MF
Vậy △MEF cân
tham khảo
I. Write sentences with the cues given
1. Mai / usually / listen / K - pop music / free time.
→ Mai usually listens to K-pop music in her free time.
2. when / I / be / a child / I / enjoy / play / computer games
→ When I was a child, I enjoyed playing computer games.
3. my father / spend / most / spare time / look after / the garden
→ My father spends most of his spare time looking after the garden.
4. watching TV / most / popular / leisure activity / Britain ?
→ Is watching TV the most popular leisure activity in Britain?
5. many teenagers / addicted / the Internet / computer games
→ Many teenagers are addicted to the Internet and computer games.
6. she / get / hooked / the medical drama / after / watch / the first people
→ She got hooked on the medical drama after watching the first episode.
7. most / my friends / prefer / play sports / to / surf the net
→ Most of my friends prefer to play sports rather than surf the net.
8. today's world / teenagers / rely / technology / more / the past
→ In today's world, teenagers rely on technology more than in the past
II. Write the second sentences so that it has a similar meaning to the first one
1. It takes us more than two hours to see the film " Avatar "
→ The film " Avatar " requires more than two hours of our time to watch.
2. She likes to hang out with friends on Saturday evening
→ She's interested in socializing with friends on Saturday evening
Ta có:
\(S_{MNC}=\dfrac{1}{2}.MN.CH=11\left(cm^2\right)\)
\(\Rightarrow CH=\dfrac{2.11}{MN}=\dfrac{22}{6}=\dfrac{11}{3}\left(cm\right)\)
1 What were Tim and Matt do when you saw them?
2 Were you swimming
3 What was he doing?
4 he was just trying
5 Were they laughing?
6 Was Matt making
7 Was he watching
8 Were you wearing