Which of the following is NOT an example of a repeated-measures design? a researcher tests memory performance of students before and after their first year of high school

a researcher tests symptoms of anxiety before and after a new therapeutic treatment

a researcher measures self-perception before and after participants take a Zumba class

a researcher tests whether indviduals from Generation Z use social media in ways that are different from Millenials

1010: 3030

is it i think

, 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