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SO SÁNH:
A=\(\frac{\frac{2016}{1}+\frac{2015}{2}+\frac{2014}{3}+.....+\frac{2}{2015}+\frac{1}{2016}}{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+.....+\frac{1}{2016}+\frac{1}{2017}}\)
VÀ
B=2017
So sánh A và B \(choA=\frac{2016^{2016}+2}{2016^{2016}-1};B=\frac{2016^{2016}}{2016^{2016}-3}\)
1/Tính nhanhP(1-frac{1}{2^2}) x (1-frac{1}{3^2}) x (1-frac{1}{4^2}) x ... x (1-frac{1}{50^2})2/Cho Q(1-frac{1}{2^2}) x (1-frac{1}{3^2}) x (1-frac{1}{4^2}) x ... x (1-frac{1}{40^2}) . So sánh Q với frac{1}{2}3/So sánh: A frac{2016^{2016}+1}{2016^{2017}+1}và B frac{2016^{2017}-3}{2016^{2018}-3}
Đọc tiếp
1/Tính nhanh
P=(1-\(\frac{1}{2^2}\)) x (1-\(\frac{1}{3^2}\)) x (1-\(\frac{1}{4^2}\)) x ... x (1-\(\frac{1}{50^2}\))
2/Cho Q=(1-\(\frac{1}{2^2}\)) x (1-\(\frac{1}{3^2}\)) x (1-\(\frac{1}{4^2}\)) x ... x (1-\(\frac{1}{40^2}\)) . So sánh Q với \(\frac{1}{2}\)
3/So sánh: A = \(\frac{2016^{2016}+1}{2016^{2017}+1}\)và B = \(\frac{2016^{2017}-3}{2016^{2018}-3}\)
a)Chứng minh rằng: \(\frac{200-\left(3+\frac{2}{3}+\frac{2}{4}+..+\frac{2}{100}\right)}{\frac{1}{2}+\frac{2}{3}+\frac{3}{4}+...+\frac{99}{100}}=2\)
b)\(A=\frac{-21}{10^{2016}}+\frac{-12}{10^{2017}};B=\frac{-12}{10^{2016}}+\frac{-21}{10^{2017}}\)
So sánh A và B
1. \(B=\frac{12}{\left(2.4\right)^2}+\frac{20}{\left(4.6\right)^2}+...+\frac{388}{\left(96.98\right)^2}+\frac{396}{\left(98.100\right)^2}\)
So sánh \(B\) với \(\frac{1}{4}\)
2. SO sánh \(A=\frac{2015}{2016}+\frac{2016}{2017}+\frac{2017}{2018}\) và \(B=\frac{2015+2016+2017}{2016+2017+2018}\)
T=\(\frac{2}{2^1}\)+ \(\frac{3}{2^2}\)+\(\frac{4}{2^3}\)+...+\(\frac{2017}{2^{2016}}\). So sánh T với 3
So sánh A=\(\frac{2017^{2017}}{1+2017+2017^2+....+2017^{2016}}\)
B=\(\frac{2016^{2017}}{1+2016+2016^2+...+2016^{2016}}\)
Cho tổng T = \(\frac{2}{2^1}\)+ \(\frac{3}{2^2}\)+ \(\frac{4}{2^3}\)+ ... + \(\frac{2016}{2^{2015}}\)+ \(\frac{2017}{2^{2016}}\)
So sánh T với 3
Cho tổng T=\(\frac{2}{2^1}\)+\(\frac{3}{2^2}\)+\(\frac{4}{2^3}\)+...+\(\frac{2016}{2^{2015}}\)+\(\frac{2017}{2^{2016}}\)
So sánh T với 3.