Question

What is the pattern rule for 1,2,4,8,16

Answer 1

Are you sure of the last number? I cannot imagine any pattern rule that includes 17 in this series.

Answer 2

Can you get from 1 to 2 using addition? Will adding that same number to 2 get you to 4?
Use the same thinking process with multiplication.
You can eliminate subtraction and division from consideration because the numbers are increasing.

Answer 3

FIRST=1=2^0=2^1-1
SECOND=2^(2-1)
THIRD=2^(3-1)
........................
NTH=2^(n-1)

Answer 4

"Welcome to OpenStudy. I can guide regarding this useful site; ask your doubts from me, for it you can message me. Please use the chat for off topic questions. And remember to give the helper a medal, by clicking on "Best Answer". We follow a code of conduct, ( http://openstudy.com/code-of-conduct ). Please take a moment to read it."