b3= 27
b4= 81
De aici scoatem ratia q
b4=b3*q => q= [tex]\frac{b4}{b3}[/tex] = [tex]\frac{81}{27}[/tex] = 3
b2= [tex]\frac{b3}{q}[/tex] = [tex]\frac{27}{3}[/tex] = 9
b1 = [tex]\frac{b2}{q}[/tex] = [tex]\frac{9}{3}[/tex] = 3
Deci termenii sunt 3, 9, 27, 81
