TINH BANG CACH THUAN TIEN NHAT
1/6 + 1/12 +1/ 20 + 1/30
1 Tinh bang cach thuan tien
a 25+ 69+75+11
b 64*867+36*867
c 25*989*4+25
Tính
A = 1/4 + 1/12 + 1/36 + ....... + 1/972 + 1/ 2916
tinh bang cach thuan tien:
3/5+4/7+2/5+1/7+2/7=
tinh bang cach thuan tien nhat
1/2+1/6+1/12+1/20
1/2+1/6+1/12+1/20+.........+19900
1/2+1/3+1/4+1/8+1/16
1/2+1/3+1/4+1/8+1/16+.......+1/512
tinh bang cach thuan tien nhat a.3/5+4/7+2/5+1/7+2/7 b.1/3+1/6+4/3+2/6+2/3
Tinh bang cach thuan tien:
c)1/9+2/5+1/3+3/10
Tính tổng sau bằng cách hợp lí :
A = 1/4 + 1/12 + 1/36+ ...+ 1/972 + 1/2916
Tính tổng sau bằng cách hợp lí
A = \(\dfrac{1}{4}+\dfrac{1}{12}+\dfrac{1}{36}+...+\dfrac{1}{972}+\dfrac{1}{2916}\)