What is the sum of the first 88 positive multiples of 3?

Answer 1

Sum_ap = ½ × number_of_terms × (first_term + last_term)

For the first 88 multiples of three:

number_of_terms = 88

first_term = 1 × 3 = 3

last_term = 88 × 3 = 264

→ Sum = ½ × 88 × (3 + 264) = 44 × 267 = 11748

Answer 2

You can use the formula for the sum of an arithmetic sequence for that.

Answer 3

The sum is 11748.