An Interesting Sum with Factorials 😁

🤩 Hello everyone, I'm very excited to bring you a new channel (aplusbi) Enjoy...and thank you for your support!!! 🧡🥰🎉🥳🧡 youtube.com/@SyberMathShorts    / @aplusbi   ❤️ ❤️ ❤️ My Amazon Store: www.amazon.com/shop/sybermath When you purchase something from here, I will make a small percentage of commission that helps me continue making videos for you. If you are preparing for Math Competitions and Math Olympiads, then this is the page for you! CHECK IT OUT!!! ❤️ ❤️ ❤️ ❤️ A Differential Equation | The Result Will Surprise You!    • A Differential Equation | The Result ...   ❤️ Crux Mathematicorum: cms.math.ca/publications/crux/ ❤️ A Problem From ARML-NYSML Math Contests:    • A Problem From ARML-NYSML Math Contests   ❤️ LOGARITHMIC/RADICAL EQUATION:    • LOGARITHMIC/RADICAL EQUATION!!! (Chal...   ❤️ Finding cos36·cos72 | A Nice Trick:    • Finding cos36·cos72 | A Nice Trick   ⭐ Join this channel to get access to perks:→ bit.ly/3cBgfR1 My merch → teespring.com/stores/sybermath?page=1 Follow me → twitter.com/SyberMath Subscribe → youtube.com/SyberMath?sub_confirmation=1 ⭐ Suggest → forms.gle/A5bGhTyZqYw937W58 If you need to post a picture of your solution or idea: twitter.com/intent/tweet?text=@SyberMath #radicals #radicalequations #algebra #calculus #differentialequations #polynomials #prealgebra #polynomialequations #numbertheory #diophantineequations #comparingnumbers #trigonometry #trigonometricequations #complexnumbers #math #mathcompetition #olympiad #matholympiad #mathematics #sybermath #aplusbi #shortsofsyber #iit #iitjee #iitjeepreparation #iitjeemaths #exponentialequations #exponents #exponential #exponent #systemsofequations #systems #functionalequations #functions #function #maths #counting #sequencesandseries #algebra #numbertheory #geometry #calculus #counting #mathcontests #mathcompetitions via @YouTube @Apple @Desmos @NotabilityApp @googledocs @canva PLAYLISTS 🎵 : Number Theory Problems:    • Number Theory Problems   Challenging Math Problems:    • Challenging Math Problems   Trigonometry Problems:    • Trigonometry Problems   Diophantine Equations and Systems:    • Diophantine Equations and Systems   Calculus:    • Calculus