Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  EAMCET  >>  Mathematics
0 votes

If N denotes the set of all positive integers and if $f: N \to N$ is defined by $f(n) =$ the sum of positive divisors of n then, $f(2^k.3),$ where k is a positive integers, is :

\[\begin {array} {1 1} (a)\;2^{k+1} -1 & \quad (b)\;2(2^{k+1}-1) \\ (c)\;3(2^{k+1}-1) & \quad (d)\;4(2^{k+1}-1) \end {array}\]

Can you answer this question?

1 Answer

0 votes
answered Feb 27, 2014 by meena.p

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, AIPMT Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App