Uploaded July 2021 | Updated September 2026, 7 hours ago

---

In this video we evaluate f(1)+f(2)+...+f(2021) where f(n) = (4n+sqrt(4n^2-1))/(sqrt(2n+1)+sqrt(2n-1)). We use algebra to simplify f(n) and make the question easier.

Subscribe ✅
youtube.com/c/DrWeselcouch

Reddit 👽
reddit.com/user/CoffeeAndCalcWithDrW

Discord 🎮
COMING SOON!

PLAYLISTS 🎵 :
Multivariable Calculus Problems: youtube.com/playlist?list=PLscpLh9rN1RcdbQLLvRItUxOMRKnbDJaw
Calculus 2 Problems: youtube.com/playlist?list=PLscpLh9rN1RcqIZyidbChYLuMAdZhhEwN
Number Theory Problems: youtube.com/playlist?list=PLscpLh9rN1RfOeiBA6o4YSXtAWF3-3_AT
Math and Minecraft: youtube.com/playlist?list=PLscpLh9rN1Rf-dqLO4r3GAwvm1O_xL7D1
Combinatorics Problems: youtube.com/playlist?list=PLscpLh9rN1RfNzyUsA_KzsfQ_k1AR9Ebs
Geometry Problems: youtube.com/playlist?list=PLscpLh9rN1RdFKjA3-vvTL_xG6s3YxB6r
Calculus Problems: youtube.com/playlist?list=PLscpLh9rN1Rcv3XYXq5Z0oXMEOVL-aocI
Linear Algebra Problems: youtube.com/playlist?list=PLscpLh9rN1Rfo0ifw9RZFoJ2Te2jk_pwX
Statistics Problems: youtube.com/playlist?list=PLscpLh9rN1RexwCjV9_1RmfluCTv5HKe1