Tìm x
\(2^x+2^{x+3}=144\)
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\(2^x+2^{x+3}=144\)
\(\Rightarrow2^x\left(1+2^3\right)=144\)
\(\Rightarrow2^x.9=144\Rightarrow2^x=16\Rightarrow x=4\)
2x + 3 + 2x = 144
<=> 2x (2^3 + 1) = 144
<=> 2x . 9 = 144
<=> 2x = 16
<=> x = 4
2^x + 2^x-3 = 144
\(2^xx1+2^xx2^3\)\(=144\)
\(2^x.\left(1+2^3\right)=144\)
\(2^x.9=144\)
\(2^x=144:9\)
\(2^x=16\)
\(2^x=2^4\)
\(=>x=4\)
2x+2x+3=144
=>2x+2x.23=144
=>2x+2x.8=144
=>2x.(8+1)=144
=>2x.9
=>2x=144:9
=>2x=16=24
=>x=4
2x+2x+3=144
2x . 1 + 2x . 23 = 144
2x . ( 1 + 23 ) = 144
2x . 9 = 144
2x = 144 : 9
2x = 16
2x = 24
=> x = 4
2x+3+2x=144
=> 2x.(23+1)=144
=> 2x.(8+1)=144
=> 2x.9=144
=> 2x =144:9
=> 2x =16
=> 2x=24
=> x=4
Học vui!^^
Ta có:\(2^{x+3}+2^x=144\)
\(\Rightarrow2^x\left(2^3+1\right)=144\)
\(\Rightarrow2^x.9=144\)
\(\Rightarrow2^x=16\Rightarrow2^x=2^4\)
\(\Rightarrow x=4\)
1: =>-4x=14
=>x=-7/2
2: =>(x-5)(x+2)=0
=>x=5 hoặc x=-2
3: =>2^x*9=144
=>2^x=16
=>x=4
2x+23.2x=144
(2x.1)+(2x.23)=144
2x.(1+23)=144
2x. 9 =144
2x =144:9
2x =16
2x =24
\(\Rightarrow\)x =4
\(2^x+2^{x+3}=144\)
\(\Leftrightarrow2^x\left(1+2^3\right)=144\)
\(\Leftrightarrow2^x=16\)
\(\Leftrightarrow x=4\)
\(2^x+2^{x+3}=144\)
\(\Rightarrow2^x+2^x.2^3=144\)
\(\Rightarrow2^x.\left(1+2^3\right)=144\)
\(\Rightarrow2^x.9=144\)
\(\Rightarrow2^x=16\)
\(\Rightarrow2^x=2^4\)
\(\Rightarrow x=4\)
Vậy \(x=4\)
\(2^x+2^{x+3}=144\)
=> \(2^x.\left(1+2^3\right)=144\)
=> \(2^x.\left(1+8\right)=144\)
=> \(2^x.9=144\)
=> \(2^x=144:9\)
=> \(2^x=16\)
=> \(2^x=2^4\)
=> \(x=4\)
Ta co :
2^x+2^x+3=144
2^x.1+2^x.2^3=144
2^x(1+2^3)=144
2^x.9=144
2^x=144:9
2^x=16
Ma :2^x=2^4
=>x=4
****
fuck you!~!~
2^x +2^x+3 =144
» 2^x .1+2^x. 2^3 =144
»2^x. (1+2^3) =144
»2^x. 9=144
» 2^x =16
» x=4