a}hay phan tich 20 thanh tong cac so tu nhien sao cho tich sao cho tich cac so tu nhien ay deu bang 20
ban co the lam nhu the voi bat ki so tu nhien nao duoc ko
neu co ba o vuong, o thu 1 co 3 so nhu sau: 2, -1, -3. O thu 2 co 3 so: 5, -4, 3, va o cuoi cung cung co 3 so: -5, 6, 9. Vay nguoi ta hoi lam the nao de cho tong cua ba hop duoc bang nhau, nhung cac ban chi duoc di chuyen mot so cua o nay qua o khac thoi nhe, nho day. Ban nao tra loi duoc cho mik ket ban nhe!
BAI 1: A] QUY DONG MAU HAI PHAN SO SAU : -3 / 16 ; 5/24;-21/56
B] TRONG CAC PHAN SO DA CHO , PHAN SO NAO CHUA TOI GIAN ?
TU NHAN XET DO , TA CO THE QUY DONG MAU CAC PHAN SO NAY NHU THE NAO ?
1.Cho A=1/2!+2/3!+3/4!+...+2015/2016!
Chung minh :A<1
2.Cho A=8n+193/4n+3
Tim so tu nhien n de A la phan so toi gian
Cac ban nho viet ca cach lam nua
Ko can lam het dau,biet lam cau nao thi lam
cac ban oi minh hoc lop va co diem hoc ki la 9,1 nhung khi minh tinh lai thi la 9,14 vay theo cac ban diem 9,14 co the lam tron thanh 9,2 ko?
so sanh 625^5 va 125^7 gup minh voi cac ban oi
cac ban oi gip minh voi bai so sanh :6mu7 va 12mu5
So sanh cac phan so sau
a)3/124;1/41;5/207;2/83
b)134/43;55/21;74/19;116/37
c)16/9;24/13
Ko quy dong va so sanh cac ban giup minh voi
tim cac so tu nhien a , b c sao cho :
a+ b + c =abc va a > b > c > 0 ( a , b , c la 1 so tu nhien co 1 hoac nhieu chu so ! )
ban nao lam dung minh tk cho nhe !
the nay cac ban hieu chua !
lam lai ho minh nhe !