3. If f is integrable on [a,b] , then there exists a number c ∈[a,b] such that
.
(A)O
(B)X
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統計: A(0), B(1), C(0), D(0), E(0) #2348338
統計: A(0), B(1), C(0), D(0), E(0) #2348338