Nick is making a deposit with a check and wants cash back. his deposit slip has his name, his account number, the date, the amount of the check, his signature, the total deposit amount, and what else? a. a record of his last deposit b. the check number c. his account balance d. the amount of cash he wants select the best answer from the choices provided

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for