Answer:
The value of 
Step-by-step explanation:
We have given 
d=1.7
We have to find 
So,
from the formula

When n=14




Using the formula:

When n=26
![s_{26}=\frac{26}{2}[2(-18)+(26-1)(1.7)]](https://tex.z-dn.net/?f=s_%7B26%7D%3D%5Cfrac%7B26%7D%7B2%7D%5B2%28-18%29%2B%2826-1%29%281.7%29%5D)
On simplification we get:

Answer:5n^2
Step-by-step explanation:
Answer:
12:20:25
I thnk this is it. I'm not sure though
It wants you to complete the function using -10 for x. . .
e.g: f(x) = 1/2x + 2
f(-10) = 1/2(-10) + 2
f(-10) = 3
114 is the answer hope this helps good luck and god bless!