The sum would be written as:

It goes from n=1 to =5 because it is the first 5 terms of the sum.
The sequence has a first term, a₁, of 1. The common difference, d, is 3. The explicit formula would then be:

Using the distributive property to simplify, we would have:
The domain<span> of a function is the complete set of possible values of the independent variable. In plain English, this definition means: The </span>domain<span> is the set of all possible x-values which will make the function "work", and will output real y-values.
so the given is already the domain
</span><span>x is less than or equal to 1</span>
Answer:
f(1) = -7
Step-by-step explanation:
Step 1: Define
f(x) = -x² + x - 7
f(1) = x = 1
Step 2: Substitute and Evaluate
f(1) = -(1)² + 1 - 7
f(1) = -1 + 1 - 7
f(1) = -7
Answer:
4 (c - 3) = 8
4c - 12 = 8
4c = 8 + 12
4c = 20
c = 20 ÷ 4
<u>c</u><u> </u><u>=</u><u> </u><u>5</u>
Hope it helps!