Question

obtenha a razão de cada pg e calcule o 6 termo

a) ( 5,15,45...)
B) ( -3,-12,-48...)
C) ( -100,-10,-1...)
D) (4,-8,16...)
E) ( 1,2,4...)

Answer 1

a)
a1 = 5 , q=3
a6 = a1q^5 = 5.3^5 = 5.243 = 1215
b)
a1 = -3  q = 4
a6 = -3.4^6 = -3 . 4096 = 12288
c) 
a1= -100 q= 1/10
a6 = -100.(1/10)^6 = -100 . 1/1000000 = -1/10000
d) 
a1 = 4 q= -2
a6 = 4.(-2)^6 = 4.64 = 256
e)
a1= 1 q= 2
a6= 1.2^6 = 1.64 = 64

(a6 = sexto termo)