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Invidious > Channel > blackpenredpen

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YT 9 minutes 29 seconds 28K views Shared 2 weeks ago blackpenredpen Don't bother me, I am thinking. (Lambert W function) YT 16 minutes 30 seconds 17K views Shared 3 weeks ago blackpenredpen No one showed up to his 9th grade math talk, so we made a video! (Pell's equation ft. @octopuskeng) YT 4 minutes 13 seconds 28K views Shared 1 month ago blackpenredpen Integral battle! 2024 vs 2025

YT 12 minutes 59 seconds 50K views Shared 1 month ago blackpenredpen You probably haven't solved a quartic equation like this before! YT 9 minutes 15 seconds 54K views Shared 1 month ago blackpenredpen Finding the BIGGEST rectangle under y=x^3 (but NO calculus!) YT 6 minutes 29 seconds 47K views Shared 2 months ago blackpenredpen A proof for sin(a+b) and cos(a+b) that you probably haven’t seen before

YT 6 minutes 46 seconds 82K views Shared 2 months ago blackpenredpen You probably haven't solved a square root equation like this before YT 5 minutes 37 seconds 102K views Shared 2 months ago blackpenredpen They didn't get this integral right, so here's the solution (Berkeley Math Tournament Integral bee) YT 8 minutes 2 seconds 28K views Shared 2 months ago blackpenredpen Finding the domain of x^x

YT 8 minutes 13 seconds 17K views Shared 2 months ago blackpenredpen Math for fun: solving (4^x+8)^4-(8^x-4)^4=(4+8^x+4^x)^4 YT 9 minutes 49 seconds 214K views Shared 3 months ago blackpenredpen Solving x^5=1 YT 7 minutes 57 seconds 31K views Shared 3 months ago blackpenredpen You don't need calculus for this question

YT 10 minutes 20 seconds 29K views Shared 3 months ago blackpenredpen Can you solve these 3 calculus tiebreakers the fastest? (2023 Berkeley Math Tournament) YT 7 minutes 41 seconds 16K views Shared 3 months ago blackpenredpen A non-real way of solving Fresnel's integrals (but I am not sure if it's legit) YT 12 minutes 17 seconds 22K views Shared 3 months ago blackpenredpen What if we changed a Fresnel's integral?

YT 8 minutes 48 seconds 17K views Shared 3 months ago blackpenredpen In how many ways can we distribute 6 distinct balls into 3 identical boxes? YT 8 minutes 6 seconds 17K views Shared 3 months ago blackpenredpen Solving improper integrals without actually solving them! (part 1) YT 9 minutes 50 seconds 51K views Shared 3 months ago blackpenredpen the COOLEST limit on YouTube!

YT 11 minutes 14 seconds 35K views Shared 4 months ago blackpenredpen I used a double integral to solve a single improper integral YT 10 minutes 42 seconds 22K views Shared 4 months ago blackpenredpen A cute limit with 0^0 form and the answer is 0 YT 9 minutes 45 seconds 49K views Shared 4 months ago blackpenredpen How Cauchy would find the maximum of sqrt(x)+sqrt(y)

YT 6 minutes 41 seconds 15K views Shared 4 months ago blackpenredpen What is the equation of the line that’s equal-distance from two given points? YT 9 minutes 55 seconds 335K views Shared 4 months ago blackpenredpen Is x^x=0 solvable? YT 8 minutes 39 seconds 62K views Shared 6 months ago blackpenredpen Can we just keep taking the natural logarithm?

YT 11 minutes 28 seconds 43K views Shared 6 months ago blackpenredpen 3 levels of "perpendicular" YT 11 minutes 6 seconds 33K views Shared 6 months ago blackpenredpen Finding the distance from a point to a line (using vectors) YT 9 minutes 37 seconds 175K views Shared 6 months ago blackpenredpen When you accidentally multiply matrices the way, but nobody notices (Reddit r/mathmemes)

YT 9 minutes 3 seconds 17K views Shared 6 months ago blackpenredpen Can we use power series for this limit of a two-variable function? YT 5 minutes 12 seconds 28K views Shared 6 months ago blackpenredpen What is f''(x) in terms of dx/dy? YT 5 minutes 43 seconds 53K views Shared 7 months ago blackpenredpen Quadratic formula but (a, b, c) goes to (0, 0, 0)

YT 6 minutes 39 seconds 40K views Shared 7 months ago blackpenredpen The most fun way of solving this quartic equation YT 9 minutes 10 seconds 88K views Shared 7 months ago blackpenredpen Quadratic formula for non-constant coefficients YT 5 minutes 59 seconds 73K views Shared 7 months ago blackpenredpen I finally took the limit of the quadratic formula

YT 7 minutes 12 seconds 57K views Shared 7 months ago blackpenredpen Math for fun: integral of ln(x) from 1 to ? is equal to 2 YT 9 minutes 7 seconds 150K views Shared 8 months ago blackpenredpen Oxford MAT asks: sin(72 degrees) YT 2 minutes 16 seconds 24K views Shared 8 months ago blackpenredpen Meet the 94-year-old calculus teacher! @ycmathematicsphysicsandche5659

YT 1 hour 31 minutes 13 seconds 310K views Shared 8 months ago blackpenredpen First time solving an A-Level maths exam! (90 minutes, uncut) YT 8 minutes 33 seconds 87K views Shared 8 months ago blackpenredpen How to solve the three-circle problem from the 2022 GCSE math exam YT 1 hour 25 minutes 23 seconds 35K views Shared 9 months ago blackpenredpen Solutions to the 2023 AP Calc AB FRQ

YT 15 minutes 17 seconds 158K views Shared 9 months ago blackpenredpen You see nonlinear equations, they see linear algebra! (Harvard-MIT math tournament) YT 7 minutes 35 seconds 458K views Shared 10 months ago blackpenredpen Which is the worst math debate: 0^0, sqrt(1), 0.999...=1, or 12/3(4)? YT 8 minutes 50 seconds 134K views Shared 10 months ago blackpenredpen You wouldn’t expect this "quadratic" equation to have 6 solutions!

YT 9 minutes 44 seconds 104K views Shared 10 months ago blackpenredpen Is this equation solvable? x^ln(4)+x^ln(10)=x^ln(25) YT 11 minutes 8 seconds 104K views Shared 11 months ago blackpenredpen My first calculus 3 limit on YouTube YT 6 minutes 37 seconds 302K views Shared 1 year ago blackpenredpen Believe in geometry, not squaring both sides!

YT 10 minutes 57 seconds 166K views Shared 1 year ago blackpenredpen How to solve a^x+bx+c=0? (Lambert W function, transcendental equation) YT 16 minutes 42 seconds 116K views Shared 1 year ago blackpenredpen My failed attempts to the integral of sqrt(sin^2(x)) YT 12 minutes 59 seconds 768K views Shared 1 year ago blackpenredpen if x+y=8, find the max of x^y (Lambert W function)

YT 13 minutes 21 seconds 99K views Shared 1 year ago blackpenredpen Calculus teacher vs L'Hopital's rule students YT 15 minutes 51 seconds 102K views Shared 1 year ago blackpenredpen combining rational exponents, but using calculus, YT 32 minutes 4 seconds 195K views Shared 1 year ago blackpenredpen easy derivative but it took me 32 minutes

YT 11 minutes 54 seconds 119K views Shared 1 year ago blackpenredpen My all-in-one calculus problem YT 5 minutes 39 seconds 128K views Shared 1 year ago blackpenredpen solving x^x=1 but x is not real! YT 11 minutes 18 seconds 90K views Shared 1 year ago blackpenredpen the sine triangle problem

YT 6 minutes 55 seconds 133K views Shared 1 year ago blackpenredpen I couldn't solve x^x^x=2, so I solved x^x^(x+1)=2 instead YT 9 minutes 55 seconds 40K views Shared 1 year ago blackpenredpen I modified the Gaussian integral! YT 9 minutes 29 seconds 145K views Shared 1 year ago blackpenredpen all solutions to 2^x-3x-1=0 (transcendental equation)

YT 14 minutes 50 seconds 496K views Shared 1 year ago blackpenredpen finally 0^0 approaches 0 (after 6 years!) YT 7 minutes 31 seconds 727K views Shared 1 year ago blackpenredpen I want all trig functions in one integral! YT 14 minutes 24 seconds 102K views Shared 1 year ago blackpenredpen Berkeley Math Tournament calculus tiebreaker