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⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀  

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Problem: Prove that the sum of the first n positive integers can be expressed as:

n(n+1)/2

Prove:

1 + 2 + 3 + ... + n = n(n+1)/2

⠀⠀⠀⣀⡤⠔⠒⠉⠉⠉⠉⠑⠒⠒⠒⠢⢄⠀⠀⠀⠀⠀⠀
⠀⠀⣠⠞⢋⠁⠀⣀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠢⣀⠀⠀⠀
⢀⠜⠁⡴⠁⠀⡰⢉⠊⠀⠰⣦⡀⠐⠵⡰⡄⠀⠀⠀⠑⢄⠀⠀
⡎⠀⡞⢕⡄⡠⠇⠈⠀⠀⠀⣿⣿⡄⠈⠞⢰⠀⡆⠀⠀⠘⡄⠀
⡅⢸⡕⣀⢏⠠⡆⣤⠀⠀⠀⠣⢈⢿⡀⠀⠀⡇⡗⣀⠀⠰⡇⠀
⡁⢸⢨⠃⡠⠒⠚⠉⢣⡀⢀⠤⠤⢌⢣⠀⠀⡇⢃⣿⡆⠀⢡⠀
⡁⠘⢯⡆⢀⢤⣄⠀⠀⠉⠉⣀⣀⠀⠀⢱⣰⠁⢸⣿⣿⡄⠀⠇
⣿⠀⢸⣿⡌⠘⠿⠇⠀⠀⠀⠹⣿⡷⠀⠸⠁⠀⣸⣿⣿⣇⡀⡅
⢸⣰⠸⣿⡁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢰⠀⢀⣿⣿⣿⡟⢸⠜
⠈⢋⣷⣽⣷⡦⠤⡀⠢⠤⡆⠀⠀⣀⢠⣼⢀⣾⣿⣿⣿⣶⣶
⠀⢸⣿⡣⢼⠀⡀⣤⢼⡻⢀⢩⣀⣠⣾⣿⣿⣿⣿⣿⣿⣿⣿
𝐃𝐨𝐧’𝐭 𝐬𝐭𝐨𝐩 𝐮𝐧𝐭𝐢𝐥 𝐲𝐨𝐮’𝐫𝐞 𝐩𝐫𝐨𝐮𝐝 ✿
𝖜𝖎𝖘𝖍 𝖞𝖔𝖚 𝖍𝖆𝖕𝖕𝖞 𝖜𝖊𝖊𝖐𝖊𝖓𝖉 💕

⠀⠀⠀⠀
⠀⠀⠀⠀
⠀⠀⠀⠀
⠀⠀⠀⠀




⠀⠀⠀⠀
⠀⠀⠀⠀

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⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀  

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have a wonderful day
or a peaceful night