Question

Please help! Find the value of the sum (click to view)

Answer 1

\[\sum_{k=1}^{4}2^k\]

Answer 2

What is 2^1

Answer 3

2

Answer 4

Since k is the exponent, this is a geometric series.
You can use the formula:
\[S_{n} = \frac{a_{1}(1 - r^{n})}{1 - r}\]
Or you can just add the terms since this is a very small series.
2^1 = 2
2^2 = 4
2^3 = 8
2^4 = 16
2 + 4 + 8 + 16 = ?

Answer 5

30. Thank you!

Answer 6

You're welcome :)