Answer:
8 inches on each side
Step-by-step explanation:
Answer:
108.43°
Step-by-step explanation:
I graphed this expression on the graph below and found the direction angle of 108.43°.
The given sequence is
a₁, a₂, ...,
![a_{n}](https://tex.z-dn.net/?f=%20a_%7Bn%7D%20)
Because the given sequence is an arithmetic progression (AP), the equation satisfied is
![a_{n}=a_{1}+(n-1)d](https://tex.z-dn.net/?f=%20a_%7Bn%7D%3Da_%7B1%7D%2B%28n-1%29d%20)
where
d = the common difference.
The common difference may be determined as
d = a₂ - a₁
The common difference is the difference between successive terms, therefore
d = a₃ - a₂ = a₄ - a₃, and so on..
The sum of the first n terms is
![S_{n}= \frac{n}{2} (a_{1}+a_{n})](https://tex.z-dn.net/?f=S_%7Bn%7D%3D%20%5Cfrac%7Bn%7D%7B2%7D%20%28a_%7B1%7D%2Ba_%7Bn%7D%29)
Example:
For the arithmetic sequence
1,3,5, ...,
the common difference is d= 3 - 1 = 2.
The n-th term is
![a_{n}=1+2(n-1)](https://tex.z-dn.net/?f=a_%7Bn%7D%3D1%2B2%28n-1%29)
For example, the 10-term is
a₁₀ = 1 + (10-1)*2 = 19
Th sum of th first 10 terms is
S₁₀ = (10/2)*(1 + 19) = 100