複選題4. (A) sin me sin ne de = 0 for all m,n N. (B) sin me cos na de = 0 for all m,n N. (C) cos me cos nae do = 0 for all m,n N. (D) sinm t cosn a dx = 0 for all m,n N.

2. (A) If f(x) is continuous on (a,b), then there is c (a,6) such that f(c) =(B) Suppose that f(x) is continuous but not differentiable at a = 0. The function g(x) = xf(x) must be differentiable at x = 0. (C) If f(2) is a differentiablo function, then . (D) If f(x) is continuous on [a, b] and differentiable on (a,b), then there is a unique c (a,b) such that f(b)-f(a)=f(c)(b-a).

複選題
4.
(A) sin me sin ne de = 0 for all m,n N.
(B) sin me cos na de = 0 for all m,n N.
(C) cos me cos nae do = 0 for all m,n N.
(D) sin^m t cosⁿ a dx = 0 for all m,n N.

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