A bird flies from the bottom of a canyon that is 88 and one tenth feet below sea level to a nest that is 845 and seven tenths feet above sea level. What is the difference in elevation between the bottom of the canyon and the​ bird's nest?

question is incomplete.

the answer is b.)

< 1=< 2

a and c

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