Bo rang day du cua mot nguoi truong thanh co32 chiec trong do co8 rang cua ,4 rang nanh ,8 rang coi nho va 12 rang ham . hoi moi loai rang chiem may phan cua tong so rang ? ( viet duoi dang phan so toi dang )
Bo rang day du cua mot nguoi truong thanh co 32 chiec trong do co 8 rang cua ,4 rang nanh,8rangcoi nho va 12 rang ham.Hoi moi loain rang chiem may phan cua tong so rang ? (Viet duoi dang phan so toi gian).
chung minh rang:
tong hoac hieu cua mot so tn voi mot phan so toi gian la mot phan so toi gian
mot bo phan cua may co 2 banh xe rang cua khop vs nhau , banh xe I co 18 rang cua, banh xe II co 12 rang cua.Nguoi ta danh dau'' * '' vao 2 rang cua dang khop vs nhau .Hoi moi banh xe phai quay it nhat bn rang de 2 rang cua danh dau ay lai khop vs nhau o vi tri giong lan truoc ?Khi do moi banh xe quay dc bn vong?
so hoc sinh trung binh cua mot truong la 120 hoc sinh , biet rang so hoc sinh kha bang 30 phan tram hoi so hoc sinh moi kha , trung binh cua truong la bao nhieu
chung to rang moi phan so co dang 2*n+3/3*n+5 la phan so toi gian
may ban co the giup mik ko, co cau noi hoi rang tai sao co the viet mot phan so bat ki co mau am thanh phan so bang no va co mau duong?
tim so tu nhien co bon chu so biet rang so do co the phan tich thamh tich cua hai thua so co tong bang 100 va mot trong hai thua so ay co dang a^a
cach lam bai : chung to rang moi phan so co dang n+2015/n+2016 ( voi n thuoc N ) deu la phan so toi gian