Question

4. The sum of the first 'n' terms of the series
1 3 7 15
+ + + + ... is
2 4 8 16
(a) 2"-n-1
(b) 1-2-5
(c) n+2-n-1
(d) 2 - 1​

Answer 1

Step-by-step explanation:

32 is the right answer I know