Find the sum of multiples of 3 upto 1000

1.	Find the sum of multiples of 3 upto 1000
Answer» Answer: --------------------------------------------- here a is 3 or 5 or 15, and n is 999 or 1000 but 999 is best, and then sum MULTIPLES of 3: 3((333) (333+1)/2)=166833 plus multiples of 5: 5(199)-(199+1)/2)=99500; and subtract multiples of 15 15((66)+ (66+1)/2)=33165 to GET 233168. PLEASE FOLLOW ME AND MAKE ME BRAINLIST DEAR.....❤️❤️❤️

Answer»

Answer:

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here a is 3 or 5 or 15, and n is 999 or

1000 but 999 is best, and then sum

3((333) (333+1)/2)=166833 plus

multiples of 5:

5(199)-(199+1)/2)=99500; and

subtract multiples of 15 15((66)+

(66+1)/2)=33165 to GET 233168.

PLEASE FOLLOW ME AND MAKE ME BRAINLIST DEAR.....❤️❤️❤️

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