Respuesta :

the nth equation is 3780 - 39n

Hello there!


117, 23.4, 4.68, …


23.4/117 = 234/1170 = 0.2


4.68/23.4 = 468/2340 = 0.2


So it's a geometric sequence with a1 = 117 and r = 0.2


an = a1rn-1


an = 117(0.2)n-1