<span>No sé la respuesta. AMO MUCHA MÚSICA
Good luck! :)</span>
Answer:

Step-by-step explanation:
You have to use the summation notation formula:

where k is the starting number, n is the ending number and f(k) is the function or the expression to be added.
In this case, you have the sum of the integer numbers from 1 to 1000. Therefore, k=1 and n=1000.
Now, you have to obtain the function f(k) which is the representation of the expression needed to obtain the correct result of the sum.
f(k=1) = 1
f(k=2)=2
f(k=3)=3 ...
You can notice that the value of k corresponds to te value of f(k) therefore f(k) = k
Replacing the values of k, n and f(k) in the formula:

Answer:
okay so basically it would be choice A.
hope this helps ;)
- ♥
<h3>
Answer: x*a^2 or a^2*x</h3>
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Work Shown:
a^(b+2) = a^b*a^2 ... break up the exponent
a^(b+2) = x*a^2 ... replace a^b with x
We don't know the value of 'a' nor the value of x, so we cannot evaluate further. This is the same as a^2*x because order of multiplication does not matter. For example, 2*3 = 6 and 3*2 = 6, so 2*3 = 3*2.
Answer:
it is 5000 in my guess . to you can ask me anytime