viet mot doan van bang tieng anh noi ve truong trinh tivi ma em yeu thich
viet bai van neu cam nghi cua em ve luong y ho Pham
The people 8 couples.Each man shakes hands with everyone else except his own wife.No two women shake hands with each other .What is the total number of handshakes among these 8 people ?
giai loi bai toan bang tieng viet gium minh minh tang ban 1 like
anh hai di ve que voi van toc la 30 km/gio thi ve som hon du dinh la 1 gio con neu di voi van toc la 20km/gio thi ve muon hon du dinh la 1gio hoi
a,quang duong dai bao nhieu
b,tinh van toc de ve dung thoi gian
Bai 1 : Viet tap hop A cac so tu nhien lon hon 4 va ko vuot qua 7 bang hai cach .
a ) Viet tap hop cac so tu nhien khac 0 va ko vuot qua 12 bang hai cach .
b ) Viet tap hop M cac so tu nhien lon hon hoac bang 11 va ko vuot qua 20 bang hai cach .
c ) Viet tap hop M cac so tu nhien lon hon 9 ,nho hon hoac bang 15 bang 2 cach .
d ) Viet tap hop A cac so tu nhien ko vuot qua 30 bang 2 cach .
e ) Viet tap hop B cac so tu nhien lon hon 5 bang 2 cach .
f ) Viet tap hop C cac so tu nhien lon hon hoac bang 18 va ko vuot qua 100 bang 2 cach .
Ai lam nhanh minh se tick cho nha ,minh can gap .
bac hanh di xe dap tu nha len thanh pho nam dinh voi van toc 15km/h bac nghi o thanh pho nam dinh nưa gio roi lai tu thanh pho ve nha voi van toc 18km/h tinh xem bac hanh ve nha luc may gio biet quang duong tu nha len thanh pho la 22,5 km va bac xuat phat luc 7 gio
Ai nhanh mk tik nhe.Nhanh len nha mk dang gap
Chung minh :
\(A=3+3^2+3^3+3^4+...+3^{25}\)Khong chia het cho 39
1) Cac ban oi , may mk ko viet dc tieng Viet , cac ban thong cam !!
2) Mk thay bai nay sao sao ay , khi nhom 3 chu so dau tien thi van chia het cho 39 ma ! Ai co cach giai naof hay ko ?? Giup mk voi ak !!
HELP ME , PLEASE !!!!! ^^
cạch giai bai toan :luc 8 gio 30 phut , mot cano khoi hanh tu ben a den ben b . den ben b ca no nghi 2 gio 15 phut roi tu ben b tro ve ben a ve den ben a luc 16 gio 45 phut . tinh khoang cach tu a den ben b , biet rang van toc rieng cua ca no la 24,3km/gio va van toc cua cua dong nuoc la 2,7km/gio
GIUP MINH NHA ! AI GIUP MINH MINH LIKE CHO . HUA DAY
hoi nay minh mooi thi violympic toan bang toan tieng anh ne!
Minh rat vui vi duoc 290 diem