Ta có : \(2^x+2^{x+1}+2^{x+2}+2^{x+3}=480\)
\(\Leftrightarrow2^x\cdot\left(1+2^1+2^2+2^3\right)=480\)
\(\Leftrightarrow2^x\cdot15=480\)
\(\Leftrightarrow2^x=32=2^5\)
\(\Leftrightarrow x=5\)
Vậy : x=5
Ta có : 2x + 2x + 1 + 2x + 2 + 2x + 3 = 480
=> 2x.(1 + 2 + 22 + 23) = 480
=> 2x.= 32
=> 2x = 25
=> x = 5
Vậy x = 5
2x + 2x+1 + 2x+2 + 2x+3 = 480
2x + 2x . 2 + 2x . 22 + 2x . 23 = 480
2x ( 1 + 2 + 22 + 23 ) = 480
2x . 15 = 480
2x = 480 : 15
2x = 32
2x = 25
=> x = 5
Vậy x = 5
Hok tốt
# owe
Đề: 2x + 2x+1 + 2x+2 + 2x+3 = 480
\(\Leftrightarrow\)2x . (1 + 2 + 22 + 23) = 480
\(\Leftrightarrow\)2x . ( 1 + 2 + 4 + 8 ) = 480
\(\Leftrightarrow\)2x . 15 = 480
\(\Rightarrow\)2x = 480 : 15
\(\Rightarrow\)2x = 32
\(\Rightarrow\)2x = 25
\(\Rightarrow\)x = 5
Vậy x = 5
Học tốt nhé^^