a) \(2^x+2^{x+3}=144\)

\(2^x\left(1+2^3\right)=144\)

\(2^x.9=144\)

\(2^x=144:9=16\)

=> \(2^x=2^4\Rightarrow x=4\)

b) \(2^{x-1}+5.2^{x-2}=224\)

\(2^{x-2}\left(2+5\right)=224\)

\(2^{x-2}.7=224\Rightarrow2^{x-2}=32\Rightarrow2^{x-2}=2^5\)

=> x - 2 = 5 => x = 7

a ) 2^x + 2^{x + 3} = 144
=> 2^x . ( 1 + 2³ ) = 144

=> 2^x . 9  = 144

=> 2^x = 16

=> 2^x = 2⁴

=> x = 4
Vậy x = 4

b ) 2^{x - 1}  + 5. 2^{x - 2} = 224

=> 2^{x - 2} . ( 2 + 5 ) = 224

=> 2^{x - 2} . 7 = 224

=> 2^{x - 2} =  32

=> 2^{x - 2} = 2⁵

=> x - 2 = 5

=> x = 7

Vậy x = 7

(x - 5)² = 16

=> (x - 5)² = 4²

=> \(\orbr{\begin{cases}x-5=4\\x-5=-4\end{cases}}\)

=> \(\orbr{\begin{cases}x=9\\x=1\end{cases}}\)

(2x - 1)³ = -64

=> (2x - 1)³ = -4³

=> 2x - 1 = -4

=> 2x = -4 + 1

=> 2x = -3

=> x = -3/2

( x - 5)² = 16

=> (x - 5)² = 4²

=> \(\orbr{\begin{cases}x-5=4\\x-5=-4\end{cases}}\)

=> \(\orbr{\begin{cases}x=9\\x=1\end{cases}}\)

3^( x-1) = 1/243
=> 3^x : 3 = 1/243
=>3^x = 3/243 = 1/81
=> x = -4 ( vì 3^-4 = 1/(3^4) = 1/81)

2^x + 2^(x + 3) = 144
=> 2^x + 2^x.2^3 = 144
=> 2^x ( 1 + 2^3) = 144
=> 2^x . 9 = 144
=> 2^x = 144/9 = 16
=> x = 4 ( vì 2^4 = 16 )

a) \(2^{4x}-3^{2x}=144-164:41\)

\(\Leftrightarrow16^x-9^x=144-4\)

\(\Leftrightarrow\) ......

bjan tự tính tiếp đc òi                 

b: Ta có: \(2^{x+3}+2^x=144\)

\(\Leftrightarrow2^x\cdot9=144\)

\(\Leftrightarrow2^x=16\)

hay x=4

a) (x ^ 54)^2 = x                                         

         x^108  = x

Để: x^108  = x 

=> x=0 hoặc x=1

\(3^{x+2}=243\) 

\(3^{x+2}=3^5\)   

=>  x + 2 = 5 

=>  x = 3 

\(2^{x+3}+2^x=144\)  

\(2^x.8+2^x=144\)  

\(2^x.\left(8+1\right)=144\)  

\(2^x.9=144\)  

\(2^x=16\)  

=>  x = 4  

\(3^5+2=243\)  cái này bạn sai nhé. không ra đâu

\(2^4+3+2^7=147\)cái này bạn sai nhé. không ra đâu

\(2^x+2^{x+3}=144\)

\(\Rightarrow2^x+2^x.2^3=144\)

\(\Rightarrow2^x.\left(1+2^3\right)=144\)

\(\Rightarrow2^x.9=144\)

\(\Rightarrow2^x=144:9\)

\(\Rightarrow2^x=16\)

\(\Rightarrow2^x=2^4\)

\(\Rightarrow x=4\)

Vậy x = 4

_Chúc bạn học tốt_

\(2^x+2^{x+3}=144\)

\(\Leftrightarrow2^x+2^x\cdot2^3=144\)

\(\Leftrightarrow2^x+2^x\cdot8=144\)

\(\Leftrightarrow2^x\left(1+8\right)=144\)

\(\Leftrightarrow2^x\cdot9=144\)

\(\Leftrightarrow2^x=144:9\)

\(\Leftrightarrow2^x=16\)

\(\Leftrightarrow2^x=2^4\)

\(\Leftrightarrow x=4\)

Vậy x=4

\(4^2.x+2^4.x+3=144\\ \Rightarrow16x+16x+3=144\\ \Rightarrow32x=144-3\\ \Rightarrow32x=141\\ \Rightarrow x=\dfrac{141}{32}\)

2x + 2x + 3 = 144

         =>  2x . 1 + 2x . 23 = 144 

          => 2x . (1 + 23) = 144

         =>  2x . 9 = 144

         => 2x = 144 : 9 = 16

        => x = 4