The formula for the sum of n terms in an arithmetic progression is:
S = n/2 * (2a + (n-1)d)
Here, the common difference, d, is 8 and the first term, a, is 1. Substituting these into the formula, we get:
S = n/2 * (2*1 + 8(n - 1))
S = n + 4n² - 4n
S = 4n² - 3n
The answer is A.
Answer:
254
Step-by-step explanation:
the angle is 254
Answer:

Step-by-step explanation:

Since there aren't any like terms, the answer would be:

Hope this helps!
Answer:
-1/2
Step-by-step explanation:
Tell me if you want a step by step.
Hope this helps. :)