Question

Calcular el término que se indica

Answer 1

PG:

1) :: 2:6:18:...

a1=2

r=3

an=a1(r)^(n-1)

n=12 => a12=2(3)^(12-1)

a12=354294

2) :: 243:81:27:...

a1=243

r=1/3

an=a1(r)^(n-1)

n=10 => a10=243(1/3)^(10-1)

a10=0,0123456789

3) :: 3:-6:12:...

a1=3

r=-2

an=a1(r)^(n-1)

n=14 => a14=3(-2)^(14-1)

a14=-24576

4) :: -162:54:-18:...

a1=-162

r=(-1/3)

an=a1(r)^(n-1)

n=9 => a9=-162(-1/3)^(9-1)

a9=-0.024691358