Given:
The sequence is:

To find:
The formula for the nth term in the given sequence.
Solution:
We have,

The given sequence can be written as

The sign are alternative and the absolute value of each term can be defined by the expression
, where n is a natural number.
So, the required formula is:

Therefore, the formula for nth term in the given sequence is
.
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Complete Question
The complete question is shown on the first uploaded image
Answer:
Step-by-step explanation:
From the question we are told that
The relationship is 
The number of fence post painted by chuck is
The number of fence post painted by Diana is 
can paint 10 fences more than chuck so let say the of fence painted in an hour by chuck is 
Then the number of fence post painted by Diana in one hour is

So



Answer:
ask crohme it knows the answer
Answer: The experimental probability of 2/9
Step-by-step explanation:
2/18= 1/9 * 2= 2/9 so on the first try,she sold 2 out of 18 which means the experimental probability is 2/18 = 1/9 so since this is the second try, you will have to multiply 1/9 by 2 to find the next possible outcome.