Tich cac so tu 1 den 50 co bao nhieu chu so 0 o tan cung
Cho doan thang AB goi I la giao diem cua AB voi duong trung truc cua doan thang H tren duong trung truc di lay diem khac ko trung voi I chung minh HA =HB
1) Co bao nhieu gia tri cua tham so m de phuong trinh \(\dfrac{x^2+mx+2}{x^2-1}=1\) vo nghiem:
A.3 B.1 C.2 D.0
Hay cho biet co bao nhieu so co 3 chu so ma trong moi so do co mat chu so 0
Mot hinh thang co dien tich bang 1, 8m*. Trung binh cong hai day la 9/7
co bao nhieu so co 3 chu so ma moi so co mat chu so 0
ghep 7 hinh chu nhat nho bang nhau thanh hinh chu nhat abcd co chu vu la 68 cm tinh dien tich hinh chu nhat abcd?
hay cho biet trong day so tu nhien 1,2,3,4,............,2013,2014
a, co bao nhieu chu so 1
b, co bao nhieu so 1
1) phuong trinh \(\dfrac{4}{\sqrt{x+2}}+\sqrt{x-2}=\sqrt{2-x}\) co bao nhieu nghiem:
A. 1 B. 2 C. Vo so D. 0