Question

a) 2^x+1.2^2x-24=1000
b)x là BCNN của 525;126;100

Answer 1

a,

\(2^{x+1}.2^{2x}-24=1000\\ \Leftrightarrow2^{x+1}.2^{2x}=1024\\ \Leftrightarrow2^{x+1+2x}=1024\\ \Leftrightarrow2^{3x+1}=2^{10}\\ \Leftrightarrow3x+1=10\\ \Leftrightarrow3x=9\Leftrightarrow x=3\)

Vậy x = 3.