6-1
1+1+1+1+1+1+1+1+1+1+1+5+5+5+5+5+5+5x5x5x5+6+6+6+6+6+6+6+6+6+7+7+7+7+7+77=
S=1/6^0 + 1/6^1+1/6^2 +...+1/6^2016+1/6^2017
So sánh S với 6/7
(1-2).(1-3).(1-4).(1-5).(1-6)/(6-1).(6-2).(6-2).(6-3).(6-4).(6.5) rút gọn phân số
Số?
5 + 1 = … | 4 + 2 = … | 3 + 3 = … |
1 + … = 6 | … + 4 = 6 | … + 3 = 6 |
6 – 5 = … | 6 – 2 = … | 6 – 3 = … |
6 – 1 = … | 6 – 4 = … | 6 - … = 3 |
Lời giải chi tiết:
5 + 1 = 6 | 4 + 2 = 6 | 3 + 3 = 6 |
1 + 5 = 6 | 2 + 4 = 6 | 3 + 3 = 6 |
6 – 5 = 1 | 6 – 2 = 4 | 6 – 3 = 3 |
6 – 1 = 5 | 6 – 4 = 2 | 6 - 3 = 3 |
tính 1+ \(\dfrac{6}{1+\dfrac{6}{1+\dfrac{6}{1+\dfrac{6}{1+..}}}}\)
(6/8+1)(6/18+1)(6/30+1)...(6/10700+1)=?
(1-1/6)×(1-2/6)×(1-3/6)×...×(1-11/6)
Tính (6/8+1)(6/18+1)(6/30+1)...(6/10700+1)
a.A=1 1/2 x 1 1/3 x 1 1/4 x 1 1/5 x...x1 1/2020 x 1 1/2021
b.B=1 1/2 + 1 1/6 + 1 1/12 +1 1/20+ ... + 1 1/380 + 1 1/420
c.C=1 6/8 x 1 6/18 x 1 6/30 x 1 6/44 x ... x 1 6/10700