[ WBJEE Exam ][ Mathematics ][ MTHCH07 ][Marks:1]
Question: 178
\(1 + {1 \over 2}{}^n{C_1} + {1 \over 3}{}^n{C_2} + ... + \frac {1}{n+1} {}^n{C_n}\) শ্রেণীটির যোগফল
wbjee 2012
Options:
A. \( {{{2^{n+1}-1}} \over {n+1}}\)
B. \(\frac {3(2^n -1)}{2n}\)
C. \(\frac {2^n +1}{n+1}\)
D. \(\frac {2^n+1}{2n}\)
Results:
Correct answer is shown above
Any doubts: