engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Sequences and Series Special Series
The sum of the first 'n' terms of the series \(\frac{1}{2} + \frac{3}{4}+\frac{7}{8}+\frac{15}{16}+...\) is
1
2n - n - 1
2
1 - 2-n
3
n + 2-n - 1
4
2n - 1