Question

What is the 20th term in this sequence .05,.1,.2,.4,...

Answer 1

Well since the sequence is doubling that would mean your answer will be 262,144

Answer 2

We can set up an equation.

.05 * 2^(n-1)

n being the nth term in the sequence

Plug in and solve.

.05 * 2^(20-1)

.05 * 2^19

.05 * 524, 288

The 20th term would be 262, 144.