A calculus problem went viral! Some major websites are reporting that students at a university in China had to solve this for the WiFi password in a dining hall. This is actually a pretty fun calculus problem. Watch the video for its solution!

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For the first time,I solved.took me 2 mins to solve mentally using properties of integral and equation for circle

If you understand the concept of definite integral and the wrapping function you'll easily get the answer, 3.141592653589793238

This question is super easy tho.

I am a post graduate in China,I can tell you guys the first question is a basic calculation in the postgraduate entrance exam.

Guss is 31415926535….

china:now solves it to get into your house

guess i'll use the 4G

I self taught my self the First few digits of Pi 3.141592653

Yes I SOLVED IT IN LESS THAN 20 SEC😉😉😉😉

Pie

I beleive they have to solve calculus before going to toilet

Imagine sharing a wifi hotspot in China 😡🤔🤔

Then… YOU CAN USE A REFERENCE BOOK THAT HAS A TABLE OF 438 TYPES OF FORMULAS it is what I did then use the Taylor and Maclaurin Theorem to find the sine and cosine values assuming it is is radians as it is an astronomic university

Before watching video:

When you do enough calculus problems like this and notice that the bounds are additive inverses, then the first thing you look for is an odd function. Always. Once simplified, you can see you have an integral that gives 1/4 area of a circle of radius 2 = π ≈ 3.1415926. Fortunately, it asks only for first 8 digits, because that's as much as I know off the top of my head.

when you have to do homework in a dining hall:

naive mathematician

Easyy

2π，奇偶函数对称性+定积分几何意义(圆)。

Who needs to learn math when calculators exist

This is when you consult your math major friend

student in china: uses vpn and wolfram alpha

I solved it without even seeing the thumbnail

>spends all time and effort solving the integral

>not knowing digits of pi

Wifi: Can't use the internet without solving for the password

Cellular data:

Hold my beerI solved it but wish I knew π upto 8 digits

I know 100 digits of pi, but can't simplify this one

Followed until 2:22, I’m in Algebra One, is that good?

What happens to the “dx” at the end

31415926

Sir why you take the area 1/2

Can we use Photomath

Hi there I paused video tried solving it and did get the answer but ur method of considering equation of circle was just genius (best shortcut to the sum….. )

Anyone know what education level he has in maths such as: Degree, BA, MD Etc.

Pretty easy actually.

That's too easy. I like pie

kindly prove the first part to be zero please by odd symmetry of integration please.

Haven't watched yet but looks like even odd symmetry

too sexy mate!!

Its very easy question, did it in just 40 Seconds✌✌

Very nice

Lol