blackpenredpen
1.27M subscribers
8:33
The last question on the 2022 British GCSE maths exam
blackpenredpen
30K views • 2 days ago
9:35
This is how HKDSE asked a logarithm question (Hong Kong university entrance exam)
blackpenredpen
15K views • 6 days ago
1:25:23
So you are studying for your AP Calculus exam?
blackpenredpen
22K views • 12 days ago
15:17
You see nonlinear equations, they see linear algebra! (Harvard-MIT math tournament)
blackpenredpen
117K views • 4 weeks ago
9:53
If you like exponential equations, try this!
blackpenredpen
34K views • 1 month ago
7:35
Which is the worst math debate: 0^0, sqrt(1), 0.999...=1, or 12/3(4)?
blackpenredpen
201K views • 1 month ago
8:50
You wouldn’t expect this "quadratic" equation to have 6 solutions!
blackpenredpen
113K views • 1 month ago
9:44
Using a logarithm property to make this equation easier!
blackpenredpen
84K views • 1 month ago
11:08
My first calculus 3 limit on YouTube
blackpenredpen
85K views • 2 months ago
6:37
Believe in geometry, not squaring both sides!
blackpenredpen
247K views • 4 months ago
10:57
This is not a quadratic equation! It’s the transcendental equation a^x+bx+c=0
blackpenredpen
145K views • 4 months ago
16:42
My failed attempts to the integral of sqrt(sin^2(x))
blackpenredpen
105K views • 4 months ago
12:59
if x+y=8, find the max of x^y
blackpenredpen
640K views • 4 months ago
13:21
Calculus teacher vs L'Hopital's rule students
blackpenredpen
80K views • 4 months ago
15:51
combining rational exponents, but using calculus,
blackpenredpen
93K views • 5 months ago
32:04
easy derivative but it took me 32 minutes
blackpenredpen
173K views • 5 months ago
11:54
My all-in-one calculus problem
blackpenredpen
90K views • 5 months ago
5:39
solving x^x=1 but x is not real!
blackpenredpen
114K views • 5 months ago
11:18
the sine triangle problem
blackpenredpen
81K views • 5 months ago
6:55
I couldn't solve x^x^x=2, so I solved x^x^(x+1)=2 instead
blackpenredpen
122K views • 5 months ago
9:55
Beyond the Gaussian integral
blackpenredpen
37K views • 6 months ago
9:29
all solutions to 2^x-3x-1=0 (transcendental equation)
blackpenredpen
139K views • 6 months ago
14:50
finally 0^0 approaches 0 after 6 years!
blackpenredpen
448K views • 6 months ago
7:31
I want all trig functions in one integral!
blackpenredpen
589K views • 6 months ago
14:24
Berkeley Math Tournament calculus tiebreaker
blackpenredpen
86K views • 6 months ago
8:29
I integrated the quadratic formula
blackpenredpen
405K views • 6 months ago
6:49
how is e^e^x=1 solvable??
blackpenredpen
616K views • 7 months ago
9:53
the first 5 days of calculus 2 but the integrals get harder!
blackpenredpen
60K views • 7 months ago
5:50
limit of 1/(1-cos(ln(sin(tan^-1(e^(x^2)))))) as x goes to infinity
blackpenredpen
34K views • 7 months ago
1:27:10
how to simplify trigonometric identity problems
blackpenredpen
61K views • 7 months ago
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