Question

question 8.1

evaluate the following expression

\\\frac{n(n - 1)}{2}\\

for the following values

\\(n = 5\\)

a

\\(n = 10\\)

b

enter an answer • 1 point

Explanation:

Evaluate the expression for n = 5

$$ \frac{5(5 - 1)}{2} = \frac{5(4)}{2} = \frac{20}{2} = 10 $$

Evaluate the expression for n = 10

$$ \frac{10(10 - 1)}{2} = \frac{10(9)}{2} = \frac{90}{2} = 45 $$

Answer:

Question 1

Evaluate the expression \(\frac{n(n-1)}{2}\) for \(n = 5\):
A <blank>10</blank>

Question 2

Evaluate the expression \(\frac{n(n-1)}{2}\) for \(n = 10\):
B <blank>45</blank>