Asked by Ekingdeft
What iz d. sum ov all 3digit positive integers exist dat when divided by 7 leave a remainder ov 5
Answers
Answered by
bobpursley
15x7=105
105+5=110
So, 110 is the first
then the next is 117 then 124.
sum=7 (15+16+17+....to end)+5(end-14)
What is end?
end occurs at 995รท7 or 142
sum=7 (15+16+17+...+142)+5 (128)
Now the first () is an arithmetic series for whicih there is a standard formula you can look up. Then you have it.
105+5=110
So, 110 is the first
then the next is 117 then 124.
sum=7 (15+16+17+....to end)+5(end-14)
What is end?
end occurs at 995รท7 or 142
sum=7 (15+16+17+...+142)+5 (128)
Now the first () is an arithmetic series for whicih there is a standard formula you can look up. Then you have it.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.