so sánh A và B biết A=\(\dfrac{113^{20}+1}{113^{19}+1}\)và B=\(\dfrac{113^{19}+1}{113^{18}+1}\)
So sánh: A=\(\dfrac{1}{5}+\dfrac{1}{13}+\dfrac{1}{25}+\dfrac{1}{37}+\dfrac{1}{61}+\dfrac{1}{77}+\dfrac{1}{113}\)và B=\(\dfrac{1}{2}\)
So sánh: A=\(\dfrac{1}{5}+\dfrac{1}{13}+\dfrac{1}{25}+\dfrac{1}{37}+\dfrac{1}{61}+\dfrac{1}{77}+\dfrac{1}{113}\)và B=\(\dfrac{1}{2}\)
(-113).36+45.(-113).(-113).19
help my!!1
\(\left(-133\right).36+45.\left(-133\right).\left(-133\right).19\)
\(B=4\dfrac{1}{113}x\dfrac{1}{371}-\dfrac{2}{113}x5\dfrac{370}{371}-\dfrac{3}{113x117}-\dfrac{4}{371}\)
Giúp mình với@@!
so sánh A = 1/5+1/13+1/25+1/37 + 1/61 +1/77+1/113 và B = 1/2
Cho mình hỏi bài toán so sánh phân số : A = 1/5 + 1/13 + 1/25 + 1/37 + 1/61 +1/77 + 1/113 và B = 1/2
So sánh
a)17/20 và 18/19 b)19/18 và 2023/2022
c)13/17 và 135/175 d)53/63 và 535/636
e)13/15 và 22/25 \(\dfrac{2023}{2023^2+1}và\dfrac{2022}{2022^2+1}\)
a) \(\dfrac{17}{20}< \dfrac{18}{20}< \dfrac{18}{19}\Rightarrow\dfrac{17}{20}< \dfrac{18}{19}\)
b) \(\dfrac{19}{18}>\dfrac{19+2024}{18+2024}=\dfrac{2023}{2022}\Rightarrow\dfrac{19}{18}>\dfrac{2023}{2022}\)
c) \(\dfrac{135}{175}=\dfrac{27}{35}\)
\(\dfrac{13}{17}=\dfrac{26}{34}< \dfrac{26+1}{34+1}=\dfrac{27}{35}\)
\(\Rightarrow\dfrac{13}{17}< \dfrac{135}{175}\)
So Sánh
a= 112/111+113/112+114/113
b= 111/112+112/111
Ta có:
a=3.026787138
b=2.0000(804375
->a>b
Cho bài toán sau: \(\left(1-\dfrac{2}{5}\right).\left(1-\dfrac{2}{7}\right).\left(1-\dfrac{2}{9}\right).\left(1-\dfrac{2}{11}\right).....\left(1-\dfrac{2}{113}\right)=\dfrac{a}{b}\)khi đó a+b = ?
\(\left(1-\dfrac{2}{5}\right)\left(1-\dfrac{2}{7}\right).....\left(\dfrac{2}{113}\right)=\dfrac{a}{b}\)
=>\(\dfrac{3}{5}.\dfrac{5}{7}.\dfrac{7}{9}.....\dfrac{211}{213}=\dfrac{a}{b}=>\dfrac{3}{213}=\dfrac{a}{b}=>a=3,b=213=>a+b=3+213=216\)