Violympic toán 8
Các câu hỏi tương tự
Cho tam giac ABC co 3 duong trung tuyen AM,BN,CP.Qua N ke duong thang song song voi PC cat BC tai F , duong thang qua F song song voi PN va duong thang qua B song song voi CP cat nhau tai D . Goi G la trong tam cua tam giac ABC .CMR : \(S_{ABG}=S_{GBC}=S_{GCA}\)
3(x^2 +y^2) -(y^3 + y^3) +1 voi x+y=2
tinh \(\dfrac{16a^2-40ab}{8a^2-24ab}\) voi 3a=10b
Giu
giup minh voi
cho P =x+y/x-y voi x < y=1 thì P nhan nhung gt nao
cuu voi
cho tam giac ABC co AB=6cm,AC=8cm,goc A=90 do .Ve AH vuong goc voi BC .tinh AH
bai 8 ; cho hinh chu nhat abcd . ke an,cm cung vuong goc voi bd .
a ) chung minh dn = bm .
b ) chung minh tu giac ancm la hinh binh hanh.
c) goi k la diem doi xung voi a qua n . tu giac dkcb la hinh gi . chung minh .
d ) tia am cat tia kc tai p . chung minh cac duong thang pn,ac,km dong quy .
phan tich thanh nhan tu \(x\sqrt{x}-3x+4\sqrt{x}-2\) voi x>0