Cho R1= 6 ; R2=R3=4 ; R4=8 . Uab=100V.

Từ A ra B có [R1 nt (R2//R3)]//R4

Tính Rab và U1,U2,U3,U4 và I1, I2, I3, I4

SP la so diem cau tra loi do hoc sinh chon

GP la so diem cau tra loi do hoc24 chon

1 cau tra loi duoc chon tuong ung voi 1 diem

Hoc24 co to chuc cuoc thi:

So diem GP cao nhat trong tuan se gianh duoc the cao 50k va Vip 1 hay 3 thang gi do trong Online Math.

So diem GP cao nhat trong thang se nhan duoc mot chiec ao cua Online Math.

Do la nhung gi minh biet! :)

Hà Nội, Hội An, ...

b.Xét t.giác AED và t. giác CEB có

góc DAE = góc ECB (SLT)

AD=BC (hình thang cân abcd, t/c )

=> t.giác AED = t. giác CEB (cgc)

=> AE=EB , DE=CE

Xét t.giác DEC có AE=EB , DE=CE(cmt)=>t.giác DEC cân tại E(dhnb)=>EA=EB(đpcm)

Cau hoi la gi?

Dear Mr. President,
I am writing to you about the catching of fish of many people in the lake behind my house.

I am very worried because they use electricity to catch fish. After a short time they left the lake, a lot of small fish died and floated on the water surface. Other animals such as frogs, toads and even birds also died from electric shock waves.

I would suggest the local authorities should prohibit and fine heavily anyone using this way of catching fish.

I look forward to hearing from you and seeing the protection of environment from the local authority.
Sincerely,...

C.interesting

B.volunteer

Ban full ne ban!

hi,ski,whiski.

YUP! :)