using the recurrence relation A person deposits Rs. 10, 000/- in a bank in a saving bank account at a rate of 5% per annum. Let Pn be the amount payable after n years, set up a recurrence relation to model the problem. Also using the recurrence relation, find amount payable after 7 years.
Any one can help me please. i don't know how to use recurrence relation

In this case a recurrence relation is just a formula for calculating $P_{n+1}$ if you already know $P_n$. The value of the account increases by $5$% each year, so $P_{n+1}$ must be $P_n$ plus $5$% of $P_n$, or $$P_{n+1}=1.05P_n\;.\tag{1}$$
That’s the requested recurrence relation. You also know that $P_0=10,000$, so you use $(1)$ to calculate in turn $P_1,P_2,\ldots,P_7$.
