Find a Formula for A_n ​for the Arithmetic Sequence

question 18

Multiple Choice

Find a formula for a_n ​for the arithmetic sequence. ​
16,11,6,1,-4,...
​

• A)a_n ​= 1 - 5n
• B)a_n ​= 1 + 5n
• C)a_n ​= -5n + ​21
• D)a_n ​= 5n - 21
• E)a_n ​= 5n + 21

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Definitions:

Aorta

The largest artery in the body, originating from the left ventricle of the heart and extending down to the abdomen, where it splits into smaller arteries.

Phlebitis

Inflammation of a vein, usually in the legs, that can cause pain, swelling, redness, and sometimes leading to thrombosis.

Veins Inflammation

Also known as phlebitis, a medical condition characterized by the inflammation of the veins, leading to pain and swelling.

Artery Wall

The multilayered structure of arteries, designed to withstand high pressure from heartbeats and effectively transport blood away from the heart.