So Sánh 2021^2022 và 2022^2021 :)!!!
Những câu hỏi liên quan
So sánh (19^2021+5^2021)^2022 và
(19^2022+5^2022)^2021
so sánh P=2019/2020+2020/2021+2021/2022 và Q=2019+2020+2021/2020+2021+2022
\(\dfrac{2021}{2021^2+1}và\dfrac{2022}{2022^2+1}\)so sánh
Lời giải:
Ta thấy: $\frac{2021^2+1}{2021}=2021+\frac{1}{2021}< 2022< 2022+\frac{1}{2022}=\frac{2022^2+1}{2022}$
$\Rightarrow \frac{2021}{2021^2+1}> \frac{2022}{2022^2+1}$
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so sánh 2023 mũ 2022 và 2022 mũ 2022 +2022 mũ 2021
Ta có:
\(2023^{2022}=2023\cdot2023^{2021}\)
\(2022^{2022}+2022^{2021}=2022^{2021}\cdot\left(2022+1\right)=2023\cdot2022^{2021}\)
Mà: \(2023>2022\)
\(\Rightarrow2023^{2021}>2022^{2021}\)
\(\Rightarrow2023^{2021}\cdot2023>2022^{2021}\cdot2023\)
\(\Rightarrow2023^{2022}>2022^{2022}+2022^{2021}\)
Vậy: ...
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so sánh a, A=154/155+155/156 và B=154+155/155+156 b,C=2021+2022+2023/2022+2023+2024 và D =2021/2022+2022/2023=2023/2024
a: \(B=\dfrac{154}{155+156}+\dfrac{155}{155+156}\)
\(\dfrac{154}{155}>\dfrac{154}{155+156}\)
\(\dfrac{155}{156}>\dfrac{155}{155+156}\)
=>154/155+155/156>(154+155)/(155+156)
=>A>B
b: \(C=\dfrac{2021+2022+2023}{2022+2023+2024}=\dfrac{2021}{6069}+\dfrac{2022}{6069}+\dfrac{2023}{6069}\)
2021/2022>2021/6069
2022/2023>2022/2069
2023/2024>2023/6069
=>D>C
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so sánh a, A=154/155+155/156 và B=154+155/155+156 b,C=2021+2022+2023/2022+2023+2024 và D =2021/2022+2022/2023=2023/2024
so sánh b=1/2022+2/2021+3/2020+...+2021/2+2022/1 VÀ c=1/2+1/3+1/4+...+1/2022+1/2023
B = \(\dfrac{1}{2002}\) + \(\dfrac{2}{2021}\) + \(\dfrac{3}{2020}\)+...+ \(\dfrac{2021}{2}\) + \(\dfrac{2022}{1}\)
B = \(\dfrac{1}{2002}\) + \(\dfrac{2}{2021}\) + \(\dfrac{3}{2020}\)+...+ \(\dfrac{2021}{2}\) + 2022
B = 1 + ( 1 + \(\dfrac{1}{2022}\)) + ( 1 + \(\dfrac{2}{2021}\)) + \(\left(1+\dfrac{3}{2020}\right)\)+ ... + \(\left(1+\dfrac{2021}{2}\right)\)
B = \(\dfrac{2023}{2023}\) + \(\dfrac{2023}{2022}\) + \(\dfrac{2023}{2021}\) + \(\dfrac{2023}{2020}\) + ...+ \(\dfrac{2023}{2}\)
B = 2023 \(\times\) ( \(\dfrac{1}{2023}\) + \(\dfrac{1}{2022}\) + \(\dfrac{1}{2021}\) + \(\dfrac{1}{2020}\)+ ... + \(\dfrac{1}{2}\))
Vậy B > C
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so sánh
\(\sqrt{2021}-\sqrt{2020}\) và \(\sqrt{2022}-\sqrt{2021}\)
\(\sqrt{2022}-\sqrt{2020}\) và \(\sqrt{2020}-\sqrt{2018}\)
so sánh 2021^10 2021^9 và 2022^10
So sánh hai phân số 2021/2022 và 2020/2021
\(\dfrac{2021}{2022}\) và \(\dfrac{2020}{2021}\)
\(\dfrac{2021}{2022}=1-\dfrac{1}{2022}\)
\(\dfrac{2020}{2021}=1-\dfrac{1}{2021}\)
\(\text{Vì }\)\(\dfrac{1}{2022}>\dfrac{1}{2021}=>1-\dfrac{1}{2022}>1-\dfrac{1}{2021}=>\dfrac{2021}{2022}>\dfrac{2020}{2021}\)
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