(3) Tra tien di Taxi:
Bieu gia cua mot hang xe taxi neu nhu sau: 1 km dau tien phai tra 9000 dong, tu kilomet thu hai phai tra 11000 dong. Dien so tien phai tra vao bang sau:
Quang duong di (km) | 2 | 3 | 4 | 5 | 6 |
So tien tra (dong) |
b) Cac dai luong neu trong bang tren co ti le thuan voi nhau ko?
c) Tim cong thuc bieu thi lien he giua cac dai luong ti le thuan (neu co).
chung to rang: Neu cong cac gia tri cua dau hieu voi cung mot so thi so trung binh cua dau hieu cung duoc cong voi so do
chung to rang: Neu cong cac gia tri cua dau hieu voi cung mot so thi so trung binh cua dau hieu cung duoc cong voi so do
khi nao thi hai dai luong x va y la hai dai luong ti le ngich voi nhau?
giup mk nha cam on truoc
Cho biet x va y la 2 dai luong ti le thuan biet voi 2 gia tri x1, x2 cua x co tong bang -2 thi 2 gia tri tuong ung y1, y2 cua y. Co tong bang 6 . Hoi x,y liên hệ bởi công thức nào ?
cmr:neu nhan cac gia tri cua dau hieu voi 1 hang so thi so TBC cua dau hieu cung duoc nhan len voi hang so do
Tim 3 so a,b,c biet chung ti le nghich voi 1/2,1/5/,1/7 va a+b-2c= 70
Can gap lam roi nhanh tra loi nhe
Trung binh cong cua 6 so la 4. khi them so thu bay thi trung binh cong cua chung la 5. Tim so thu bay
Tim cac GTNN cua cac bieu thuc sau
a/ \(^{\left(x-3\right)^2+2}\)