Please help!! Choose the term that best fills in the blank to complete the statement.

  multiple

Step-by-step explanation:

Purely from a sentence structure point of view, the only appropriate choice is multiple.

The sentence as written is ambiguous, not making clear whether the "which" refers to the length or the scale factor. In order to make sense, the reference must be to length.

im here

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