Can you me out by showing your work ? i have no idea how my answer is wrong

IT IS A the question is trying to trick you by including quarters, nickels, etc. If you take 1 of these for example a quarter you only 2 sides, tails & heads that means you have a 50/50 chance if you flip it or 1/2. If you don't get this I will explain it a little more, you have a 3d object, the quarter however it is flat so if you flip it it will land on side A or side B, but there is only Side A and B because it is flat on both sides. Hope you understand.

Pretty much if you flip you only have two chances not 16 like you chose.

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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