Các câu hỏi tương tự
Tính tổng
S = \(\left(1-\frac{2}{2.3}\right).\left(1-\frac{2}{3.4}\right).\left(1-\frac{2}{4.5}\right).....\left(1-\frac{2}{2015.2016}\right)\)
tính S=(1-2/2.3).(1-2/3.4). ... .(1-2/2015.2016)
(1-2/2.3)(1-2/3.4)(1-2/4.5)...(1-2/99.100)
E=((2/2.3-1).(2/3.4-1).(2/4.5-1).....(2/2019.2020-1)
(1-2/2.3).(1-2/3.4).(1-2/4.5)....(1-2/101.102)
1:Tìm x, biết:
a) (3/5)^2x-1 = 125/27
b)1/2+(1/2.3)+(1/3.4)+...+(1/2015.2016)-2x=1/2-1/2016
c)/2x^2+/x-2//=2x^2+3
Tìm x, biết:
a, (3/5)^2x-1=125/27
b,1/2+1/2.3+1/3.4+...+1/2015.2016 - 2x=1/2-1/2016
c,/2x^2+/x-2//=2x^2+3
Tính: C=1 + 1/2 x 2.3/2 +1/3 x 3.4/2 +1/4 x 4.5/2 +.............+1/20 x 20.21/2
Tính: (1-2/2.3).(1-2/3.4).(1-2/4.5)...(1-2/98.99)