Tina has been dieting for a total of 13 weeks. she lost 3 pounds on the first week of her diet, but gained back a pound on the second week. on each remaining week of her diet, she lost 2 pounds. how many pounds has tina lost in all? a. 26 pounds b. 20 pounds c. 22 pounds d. 24 pounds

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.

me

step-by-step explanation: