Recall or look in a dictionary to find the meaning of the Prefix co-. What does this prefix mean? How can it help you remember the meaning of collinear.

prefix co means: with together joint jointly codefendand associated in actoin with another fellow or co cospirator

Step-by-step expla

the answer to this question is 3/19

step-by-step explanation:

, 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