An user of Facebook which is two or more days older can send a friend request to some one to - Maths - Probability

Question

An user of Facebook which is two or more days older can send a
friend request to some one to join Facebook if initially there is
one user on day one then find a recurrence relation for an where an
is number of users after n days

Anuradha Sharma · Accepted Answer

Dear Student,

Please find below the solution to the asked query
The series will go like:On day one - 1 user on day two - 1 user on day three - 2 user on day four - 4 user on day 5 - 8 user So series will be like 1,2,4,8,16,32
so on So we can say that the relation can be defined as next number is multiplied by 2

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An user of Facebook which is two or more days older can send a friend request to some one to join Facebook if initially there is one user on day one then find a recurrence relation for an where an is number of users after n days