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\(A=\frac{54.107-53}{53.107+54}=\frac{54.107+54-107}{\left(54-1\right).107+54}=\frac{54.\left(107+1\right)-107}{54.107-107+54}=\frac{54.108-107}{54.\left(107+1\right)-107}=\frac{54.108-107}{54.108-107}=1\)
\(B=\frac{135.296-133}{134.269+135}=\frac{135.296+135-268}{\left(135-1\right).269+135}=\frac{135.\left(296+1\right)-268}{135.269-269+135}=\frac{135.297-268}{135.\left(269+1\right)-269}=\frac{135.297-268}{135.270-269}>1\)
\(\Rightarrow A< B\)
\(A=\frac{54.107-53}{53.107+54}=\frac{53.107+107-53}{53.107+54}=\frac{53.107+54}{53.107+54}=1\)
\(B=\frac{135.296-133}{134.269+135}=\frac{134.296+296-133}{134.269+135}=\frac{134.296+163}{134.269+135}\)
Vì \(134=134;296>269\Rightarrow134.269< 134.296\)mà\(163>135\Rightarrow134.269+135< 134.296+163\)hay \(B>1\)
Ta có \(A=1;B>1\Rightarrow A< B\)
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[53+(-76)]-[(-76)-(-53)]
=53+(-76)+76+(-53)
=[53+(-53)]+[(-76)+76]
=0+0=0
k cho mk nhé
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Có A = 1998 x 2002
= (2000 - 2) x (2000 + 2)
= 20002 - 22
= 20002 - 4
Mà B = 2000 x 2000 = 20002 ; 20002 - 4 < 20002
=> A < B
Có B = 35 x 53 - 18
= (34 + 1) x 53 - 18
= 34 x 53 + 53 - 18
= 34 x 53 + 35
=> B = D
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Tập ghi có dấu đi bạn ei
ghi như thế méo ai hiểu đâu
và......kết bạn nha!
>< :3 :))
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abc + acb = bca
abc
acb
-----
bca
----
(1)c+b=a+10.t (t=0hoăc1)
(2)b+c+t=c+10k (k=0 hoặc 1)
(3)a+a+k=b
--------
(2)=>b+t=10k
b<>0=>k=1
b<10=>t=1=>b=9
(3)=>a=4
(1)=>c=5
abc=495
495+459=954
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Gọi d là \(ƯC\left(2n+3;3n+4\right)\)
Ta có: \(2n+3⋮d\Rightarrow3\left(2n+3\right)⋮d\Leftrightarrow6n+9⋮d\)
\(3n+4⋮d\Rightarrow2\left(3n+4\right)⋮d\Rightarrow6n+8⋮d\)
\(\Rightarrow\left(6n+9\right)-\left(6n+8\right)⋮d\)
\(\Rightarrow6n+9-6n-8⋮d\)
\(\Rightarrow1⋮d\)
\(\Rightarrow d\inƯ\left(1\right)=\left\{1\right\}\)
Vậy \(ƯCLN\left(2n+3;3n+4\right)=1\left(đpcm\right)\)
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|-x| < 5
=> |-x| \(\in\){0;1;2;3;4}
|-x| = 0
=> x = 0
|-x| = 1
=> \(\orbr{\begin{cases}x=1\\x=-1\end{cases}}\)
|-x| = 2
=> \(\orbr{\begin{cases}x=2\\x=-2\end{cases}}\)
|-x| = 3
=> \(\orbr{\begin{cases}x=3\\x=-3\end{cases}}\)
|-x| = 4
=> \(\orbr{\begin{cases}x=4\\x=-4\end{cases}}\)
Vậy x \(\in\){0;-1;1;-2;2;-3;3;-4;4}
25 . 53 = 52 . 53 = 52 + 3 = 55
25 x 5^3 = 5^2 x 5^3 = 5^5 k minh nhá