tim xeQ biet
a.-2x+1<7
b(x+2).(x-3)<0
minh can gap nha
nhanh mih se k
so sanh 325/260 va 876/320. Giai thich gium mih luon. thanks !
Cho hai so huu ti x va y voi 0<x=a/b<1, y =a+c/b+c,c thuoc Z. Hay so sanh x va y
cho tam giac ABC vuong can tai A .ke AH vuong goc voi BC tai H,BD la phan giac goc B(D thuoc AC) tu D ke duong thang vuong goc BC cat BC tai E cat AB tai F.duong thang BD cat AH tai P,cat AE tai N a CM:CP la phan giac ACB b, so sanh DE va DF c,ke CM vuong goc AE tai M .CM:BN=AM
cac ban giup minh vs minh dang can gap
cho tam giác abc vuong tai B ke BH vuong goc voi AC tai H tren tia doi cua tia BH lay diem E sao cho BE=AC qua E ve duong thang song song voi AB cay duong thang BC tai K a)so sanh goc BCH va goc BEK b) so sanh goc BAC va goc KBE
cac bn giup t giai bai nay voi t can gap 10h30 t nop r cac bn giai ho t nhe
Cho tam giac ABC co A:B:C ti le voi 3:4:5. CHu vi =120cm.Tinh dien tich
Mih ChI CaN DaP sO
cho tam giac ABC co goc ACB bang 60 do .
a) ve tam giac ABC
b) hai tia phan giac cua goc ABC va ACB cat nhau tai I . Qua I ve duong thang song song Bc , duong thang nay cat cac duong thang AB va AC tai D v E .Tinh so do goc ACI va goc CIE
c) So sanh 2 goc DIB va ABI
d) Qua A ke AH vuong goc voi BC tai H , qua C ke CK vuong goc voi DE tai K .Giai thic vi sao AH song song voi CK
e) tinh so do goc CAH
GIAI NHANH GIUM MINH NHA!!!MINH DANG CAN GAP ...
cho tam giac ABC can tai A lay D tren AB tren tia doi cua tia CA lay CE=BD ke DF song song voi AC DE cat BC o M so sanh DB va DF
t can gap cac bn giai ho t nhe
Cho A(x)=2x²-3x+5 B(x)=-2x²-7x-5 Tính A(x)+B(x); A(x)-B(x)
Tính theo hàng dọc cho mih nha