PROOF of 2nd Fundamental Theorem of Calculus | Calculus 1 | jensenmath.ca

Proof of why the definite integral of f(x)dx from a to b is equal to F(a)-F(b).

[@chill4r585]

You explain thing incredibly intuitively, and simple to understand. Simply amazing.

[@katlegotsotetsi2131]

Beautiful🤩

[@afonsopina3068]

Hey, why do you always put dt or dx after de integral?? Does it change if you not put it?
Thx😊

[@ninjagstudio5602]

Iit's indicating the variable with respect to which you're integrating. The "dx" or "dt" part is called the differential, and it specifies which variable you're considering when finding the area under the curve or calculating some other quantity.

[@bruhifysbackup]

@@ninjagstudio5602 then why do you also substitute for the differential when doing u-sub? why not just change the dx to du?

[@chill4r585]

@@bruhifysbackup bro got stumptped