\(A=\dfrac{1}{2}+2023\cdot\dfrac{\left(\dfrac{3}{2}\right)^{2023}-1}{\left(\dfrac{3}{2}\right)-1}=\dfrac{1}{2}+4046\cdot\dfrac{3^{2023}-2^{2023}}{2^{2023}}\)
\(=\dfrac{2^{2022}+4046\cdot3^{2023}-4046\cdot2^{2023}}{2^{2023}}\)
\(A=\dfrac{1}{2}+2023\cdot\dfrac{\left(\dfrac{3}{2}\right)^{2023}-1}{\left(\dfrac{3}{2}\right)-1}=\dfrac{1}{2}+4046\cdot\dfrac{3^{2023}-2^{2023}}{2^{2023}}\)
\(=\dfrac{2^{2022}+4046\cdot3^{2023}-4046\cdot2^{2023}}{2^{2023}}\)
Cho A=3/1*2*3+3/2*3*4+3/3*4*5+.........+3/2015*2016*2017.
So sánh A với 1.
Bài 1:
a) Chứng tỏ rằng : 200 - (3+2/3+2/4+....+2/100)
--------------------------------------- = 2
1/2+2/3+3/4+....+9/100
b) Cho B =5/2.1 + 4/1.11 + 3/11.2 + 1/2.15 + 15/4.43 + 13/43
Chứng tỏ rằng B > 3
cho A=2^2018/2^2018 +3^2019 + 3^2019/3^2019+5^2020 + 5^2020/5^2020+2^2018
cho B=1/1x2+1/3x4+1/4x5+...+1/2019x1/2020 so sánh A và B làm nhanh nha các bạncho M=1/2^2+1/3^2+1/4^2+....+1/50^2
CMR:M<3/4
Cho A = 1/99 + 2/98 + 3/97 + ... + 99/1 / 1/2 + 1/3 + 1/4 + ... + 1/100
B = 94 - 1/7 - 2/8 - 3/9 - ... - 94/100 / 1/35 + 1/40 + 1/45 + ... + 1/500
Tính:A - 2.F
tính tổng:
a,1/2 x 3+1/2 x 4+1/2 x 5+...+1/9 x 10
b,3/2 x 5+3/6 8+...+3/23 x 28
giải nhanh hộ mik nha
Bài 1: Thực hiện phép tính. a) 5/16+ -5/24. b) -2/7 + 3/-5. c) -2/-5 + -5/-6. d) -5/-3 + 3/-7
A=1/2^2+1/3^2+.........+1/2018^2.CTR A khong phai la so tu nhien
Bài 1 : Tìm x
a, x/3 = 2/3 + -3/7
b, x/7 = -3/4 + 2/-9
Mn giúp mk với !