Question

Please Help!
Find the following sum: 1+2+4+8+...+2^k-1

Answer 1

What do you know so far?

Answer 2

kind of hard to help you without knowing what you learned recently

Answer 3

I learned about The and A Fibonacci sequence

Answer 4

Is it a geometric series?

Answer 5

Use
Sum=a(1-r^n)/(1-r)

Answer 6

a=first term of ur given series
r=comon ratio
n= number of term

Answer 7

Sum=?