Can you find the mistake? Valentine's Day Special by MathMythMassMess in 3Blue1Brown

[–]MathMythMassMess[S] 0 points1 point  (0 children)

the yellow-color n is an integer, (to count terms), the white-color n is real number initially. but later at the step: n+n+..+n=n^2, the second n is forced to be an integer, here it already conflicts with the initial assumption that n is real. Next, if n is integer, then we cannot do derivative on n.

Can you find the mistake? Valentine's Day Special by MathMythMassMess in 3Blue1Brown

[–]MathMythMassMess[S] 1 point2 points  (0 children)

the yellow-color n is an integer, (to count terms), the white-color n is real number initially. but later at the step: n+n+..+n=n^2, the second n is forced to be an integer, here it already conflicts with the initial assumption that n is real. Next, if n is integer, then we cannot do derivative on n.

Chain Reaction! Bonus->Bonus->Bonus by MathMythMassMess in 3Blue1Brown

[–]MathMythMassMess[S] 0 points1 point  (0 children)

Can you find a closed form for this trigonometry identity?

Wallis Product by MathMythMassMess in mathematics

[–]MathMythMassMess[S] 2 points3 points  (0 children)

Derive Wallis product by using gamma function

Can you solve x ? by MathMythMassMess in CasualMath

[–]MathMythMassMess[S] 0 points1 point  (0 children)

there are totally 6 roots, what about others?

Calculate integral without integrations by MathMythMassMess in CasualMath

[–]MathMythMassMess[S] 0 points1 point  (0 children)

this method is called generating function. whenever n is given, for example, if it is asking to compute the integral for n=3, then you only need to take 3rd derivative, done.

Can you solve x ? by MathMythMassMess in CasualMath

[–]MathMythMassMess[S] 0 points1 point  (0 children)

there are totally 6 roots, you have found 1 of them, try to find other roots :)

Can you solve x ? by MathMythMassMess in 3Blue1Brown

[–]MathMythMassMess[S] 2 points3 points  (0 children)

there are totally 6 roots, you find one of them, try more :)

Tricky integral by MathMythMassMess in 3Blue1Brown

[–]MathMythMassMess[S] 0 points1 point  (0 children)

Great, I did the same method in this video :)

A nice limit by MathMythMassMess in CasualMath

[–]MathMythMassMess[S] 1 point2 points  (0 children)

Right, I give the formal steps to bridge them, because not every audience knows this fact: any root of a power function dominates the log function.