Question

2^x+2^x+1+2^x+2+2^x+3 = 480

Answer 1

Ta có : 2^x + 2^x+1 + 2^x+2 + 2^x+3 = 480

=>       2^x . (1+2+2^2+2^3)=480

=>       2^x . 15=480

=>       2^x=480:15

=>      2^x=32

=>      2^x=2^5

=>      x=5 

Vậy x=5 

Tk và kb với mk nha :)))

Answer 2

Ta có: \(2^x+2^{x+1}+2^{x+2}+2^{x+3}=480\)

\(\Rightarrow2^x+2^x.2+2^x.2^2+2^x.2^3=480\)

\(\Rightarrow2^x.\left(1+2+2^2+2^3\right)=480\)

\(\Rightarrow2^x.15=480\)

\(\Rightarrow2^x=480\div15=32\)

\(\Rightarrow2^x=2^5\)

\(\Rightarrow x=5\)

Vậy x = 5

Answer 3

sai rùi bạn

Answer 4

2.x+2.x+1+2.x+2+2.x+3=480

2x+2x+2x+2x+<1+2+3>=480

x<2+2+2+2>+6=480

x.8+6=480

x.8=480-6=474

x=474:8

x=\(\frac{237}{4}\)