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Question Number 203875 by MathedUp last updated on 31/Jan/24

Hmmm \dots . . I have one Question .

f (t) \in C^{\infty}, {C_{}^{α} mean can derivate α times .}

where t \in R, Can f (t) integrable when S \in R ∖ {Q} ? ?

Ex . integral \int_{1}^{e} \ln (z) d z S \in [1, e]

But Except Q in set S like . . S^{^{'}} = S ∖ {Q}

than Can integrable In S^{'}

Answered by witcher3 last updated on 31/Jan/24

S is not defined

Commented by MathedUp last updated on 01/Feb/24

pls answer me

Commented by witcher3 last updated on 02/Feb/24

\int_{1}^{e} \ln (z) dz S \in [1, e]

may bee \int_{S} \ln (z) dz; S \subset [1, e] - IQ