and show that
finally prove that
i cant seem able to show that f'(x)+g'(x)=0, i think its beacause i cant derivate g(x). Help plz
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first was not meant to be defined as written, it's actually, without the square.
let and both continuous, then and now substitute in this integral and that shows that thus is constant and and then obviously then and the conclusion follows.
A very nice way to find standart integral to be .
Could you help to understand that t=ux the sum of derivatives =0.