Hay tinh trong phep tinh sau :
(0+1+2+3+...)-(1+2+3+...)=...
thuc hien cac phep tinh sau 1 cach hop ly (3.4.2^16)^2/11.2^13.4^11-16^0
Khong lam phep tinh hay so sanh:
a.[-1]*[-2]*[-3]*...*[-2009] voi 0
b.[-1]*[-2]*[-3]*...*[-10] voi 1*2*3*...*9*10
Trong vac phep tinh sau Tim cac tich bang nhau ma khong tinh ket qua cua moi tich : 11, 18 ; 15 , 45 ; 45 • 3 • 5; 6 • 3 • 1;
9 • 5 • 15 .
thuc hien phep cac phep tinh sau:
a, (1-1/2).(1-1/3).(1-1/4)...(1-1/100)
b, (1+1/1.3).(1+1/2.4).(1+1/3.5)...(1+1/99.101)
thuc hien cac phep tinh
1-2-3+4+5-6-7+...+2001-2002-2003+2004
1:" thuc hien phep tinh : (-1)+2-3+4-....-99+100
1/4 - 1/3+ 5/12 Thuc hien cac phep tinh (tinh hop li neu co the)
Cac ban hay tinh cho toi mot bai toan nhu sau
Chung to phep tinh chia het cho 3
1+2+22+23+...+22008