Question

Thanks in advance!!!!!!!!!

Answer 1

We are given the formula that calculates the sum of consecutive numbers as follows:
[ n(n+1)] / 2
where n is the last number

Now, we want to calculate the sum from 1 to 100. The last number is 100, this means that n=100

Substitute with n=100 in the given equation to get the sum as follows:
sum = [100(100+1)] / 2
sum = [100*101] / 2
sum = 10100 / 2
sum = 5050

Therefore, the correct choice is:
D. 5,050

Answer 2

100*101/2 = 5050, here u go