ʜᴀᴠᴇ ᴀ ɢʀᴇᴀᴛ ᴡᴇᴇᴋᴇɴᴅ

⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬛⬛⬜⬜⬜⬜⬜⬛⬛⬜⬜⬜
⬜⬜⬜⬛⬜⬛⬜⬜⬜⬛⬜⬛⬜⬜⬜
⬜⬜⬛⬜⬜⬛⬜⬜⬜⬛🎀⬜⬛⬜⬜
⬜⬛⬜⬜⬜⬛⬜⬜⬜⬛⬜⬜⬜⬛⬜
⬜⬛⬜⬜⬜⬜⬛⬛⬛⬜⬜⬜⬜⬛⬜
⬜⬛⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬛⬜
⬜⬛⬜⚫⬛⬜⬜⬜⬜⬜⬛⚫⬜⬛⬜
⬜⬛⬜⬜⬛⬜⬜⬜⬜⬜⬛⬜⬜⬛⬜
⬜⬛⬜⬜⬜⬜⬜🟡⬜⬜⬜⬜⬜⬛⬜
⬜⬛⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬛⬜
⬜⬛⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬛⬜
⬜⬜⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬛⬜⬜
𝘵𝘩𝘦 𝘮𝘰𝘳𝘦 𝘺𝘰𝘶 𝘭𝘰𝘷𝘦 𝘢 𝘮𝘦𝘮𝘰𝘳𝘺 𝘵𝘩𝘦 𝘴𝘵𝘳𝘰𝘯𝘨𝘦𝘳 𝘢𝘯𝘥 𝘴𝘵𝘳𝘢𝘯𝘨𝘦𝘳 𝘪𝘵 𝘪𝘴 💗

---

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀  

---

---

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀  

---

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