Question

What is the formula for the nth term of a geometric sequence with a4 = 16 and r = ?

Answer 1

a4 = ar³ = 16
Since,
a=16/r³
nth term of gp = ar^(n-1)
=16/r³×r^(n-1)
=16×r^(n-4)
Hence,
r = [16/a]⅓