Igot an 18 on my math homework bcuz of this app so i will no longer be using this app maybe idk anymore but like

Wow sorry that you got an 18, and yeah I know sometimes people give out the wrong answers but that's what happens sometimes but just read from your books or ask a teacher for help instead of coming here. Much love homie<3

answer: the answer to your question is parallel

, 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