Question

det nr nat n pt 8n+8n+1=18x2la2003

Answer 1

$8^n+8^{n+1}= 18\cdot 2^{2003}\\8^n(1+8)=18\cdot 2^{2003}\\8^n\cdot 9=18\cdot 2^{2003}\\8^n=2\cdot 2^{2003}\\2^{3n}=2^{2004}\\3n=2004\\\boxed{n=668}\\\text{Hope you understood.}$