Sam has 520 books in his library. He buys 50 more a year. Write a recursive formula that gives the number of books b(subn) in his library in year n.
How many books does he have ten years from noe?
2007-10-10 15:35:40 · 1 answers · asked by yellowducks 1 in Education & Reference ➔ Homework Help
sorry, "now"
2007-10-10 15:35:57 · update #1
In year 0, Sam has 520 books.
How many books does he have in year X?
= Number in year (X-1) + 50 book.
but I do not know how many book he had in year (X-1) so let's find out:
How many books does he have in year (X-1)?
= Number in year (X-2) + 50 book.
but I do not know how many book he had in year (X-2) so let's find out:
[and so on, until]
How many books in year 1?
= number in year 0 (i.e., 520 books) + 50
The recursive part is:
How many books does he have in year X?
50 + "How many books does he have in year X-1?"
2007-10-10 15:48:47 · answer #1 · answered by Raymond 7 · 1⤊ 0⤋