1/3+1/6+1/10+1/15+1/21+1/28+1/36+1/45
Chứng tỏ rằng: 1/10+1/15+1/21+1/28+1/36+1/45=3/10
1+1/3+1/6+1/10+1/15+1/21+1/28+1/36+1/45
(1/3-1).(1/6-1).(1/10-1).(1/15-1).(1/21-1).(1/28-1).(1/36-1)
p=1/3 +1/6 +1/10 +1/15 +1/21 +1/28 +1/36 +1/45 giúp mk với
A=\(\dfrac{1}{3}+\dfrac{1}{6}+\dfrac{1}{10}+\dfrac{1}{15}+\dfrac{1}{21}+\dfrac{1}{28}+\dfrac{1}{36}\)
A=1+1/3+1/6+1/10+1/15+1/21+1/28+1/36+1/45
So sánh A với 2
#Toán lớp 5 + 6
tính giá trị của biểu thức
E=1/3+1/6+1/10+1/15+1/21+1/28+1/36
1/6+1/10+1/15+1/21+1/28+1/36+1/45(tính tổng)