Question

find the sum of all multiples of 4 less than 100​

Answer 1

Step-by-step explanation:

number of elements in the two sets: we have to take the first and the last multiple, then compute last - first, divide by the number whose multiples are of interest and sum 1. In our case, in column A, we have , while for column B we get .

Answer 2

Answer:

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Step-by-step explanation:

We can proceed by steps:

1) number of elements in the two sets: we have to take the first and the last multiple, then compute last - first, divide by the number whose multiples are of interest and sum 1. In our case, in column A, we have , while for column B we get .

2) Compute the sum. The formula for the sum of an arithmetic progression is , where n is the number of elements in the progression and first and last are the first and the last elements. Thus, for column A, , while column B equates