Tính tổng:A=10/56+10/140+10/260+.........+10/1400
tính: 10/56+10/140+10/260+...+10/1400
tính tổng M=\(\dfrac{10}{56}+\dfrac{10}{140}+\dfrac{10}{260}+....+\dfrac{260}{1400}\)
Tính tổng : 10/56 + 10/140 + 10/260...+10/1400
tính nhanh 10/56+10/140+10/260+...+10/1400
Tính B=1-10/56-10/140-10/260-...-10/1400
Tính :
10/56+10/140+10/260+...+10/1400
tính tổng S=10/56+10/140+10/260+..............+10/1400
Tính tổng: M=10/56+10/140+10/260+...+10/1400