Question

ma puteti ajuta cu ecuatia 5^x-2 + 5^x-3 +5^x-4 = 775

Answer 1

5$5^{x}* 5^{-2}+ 5^{x}* 5^{-3}+ 5^{x}* 5^{-4} =775$ᵃᵃ 5lax(1/25+1//125+1/625)=775 inmultim cu 625 5lax(25+5+1)=775*625 5lax*31=775*625 impartim la 31 5lax=25*625 5lax=5la8, x=8