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Ta có 2^x-2^y=1024
=>2^y=2^x-1024
=>2^y=2^x-2^10
=>2^y=2^10
=>y=10
=>2^10=2^x-1024
=>2^x-1024=1024
=>2^x=1024+1024
^ là mũ nhé
Hok tốt
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S=1+2+2^2+2^3+2^4+...+2^9
2.S=2.(1+2+2^2+2^3+2^4+...+2^9)
2.S=2+2^2+2^3+2^4+2^5+...+2^10
2.S-S=S=(2+2^2+2^3+2^4+2^5+...+2^10)-(1+2+2^2+2^3+2^4+...+2^9)
S=2^10-1
S=2^10-1<5.2^8
=>S<5.2^8
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\(2A=2+2^2+2^3+...+2^{2021}+2^{2022}\)
\(A=2A-A=2^{2022}-1\)
\(B=2^{2022}\)
=> A và B là 2 số TN liên tiếp
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3x+23x+2 ⋮ 2x‐32x‐3
⇒2x‐3⇒2x‐3 ⋮ 2x‐32x‐3
⇒[﴾3x+2﴿‐﴾2x‐3﴿]⇒[﴾3x+2﴿‐﴾2x‐3﴿] ⋮ 2x‐32x‐3
⇒﴾3x+2‐2x+3﴿⇒﴾3x+2‐2x+3﴿ ⋮ 2x‐32x‐3
⇒x+5⇒x+5 ⋮ 2x‐32x‐3
⇒2﴾x+5﴿⇒2﴾x+5﴿ ⋮ 2x‐32x‐3
⇒2x+10⇒2x+10 ⋮ 2x‐32x‐3
⇒2x‐3+13⇒2x‐3+13 ⋮ 2x‐32x‐3
Mà 2x‐32x‐3 ⋮ 2x‐32x‐3
⇒13⇒13 ⋮ 2x‐32x‐3
⇒2x‐3∈Ư﴾13﴿={1;13}⇒2x‐3∈Ư﴾13﴿={1;13}
⇒2x∈{4;16}⇒2x∈{4;16}
⇒x∈{2;8}⇒x∈{2;8}
Vậy x∈{2;8}
HT:)))
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\(A=\left(2+2^2\right)+\left(2^3+2^4\right)+...+\left(2^9+2^{10}\right)=\)
\(=2\left(1+2\right)+2^3\left(1+2\right)+...+2^9\left(1+2\right)=\)
\(3\left(2+2^3+2^5+2^7+2^9\right)⋮3\)
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\(\Leftrightarrow14-\frac{72}{-\left(8+x\right)}=-23\)
\(\Leftrightarrow37+\frac{72}{8+x}=0\)
\(\Leftrightarrow37\left(8+x\right)+72=0\)
\(\Leftrightarrow296+37x+72=0\)
\(\Leftrightarrow37x=-368\Leftrightarrow x=-\frac{368}{37}\)
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