Hint :
f,g are continues funtion on [a,b]
prove or desprove by counterexample that:
if then f=g on [a,b]
?
how i tried:
i this its correct
i transfered to the other side
what now?
i cant do derivative here
because if i could the i just could do a derivative on both sides from the start
but it looks to easy thus it is a wrong move.