10. If $f \in C([0,1])$ and \begin{equation*} \int_0^x f(t) dt = \int_x^1 f(t) dt \end{equation*} for all $x \in [0, 1]$, show that $f(x) = 0$ for all $x \in [0,1]$.
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First, we know that f ∈ C([0, 1]), which means that f is a continuous function on the interval [0, 1]. Show more…
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5. Suppose that f:(0, 1) → R is any function which is bounded and continuous on (0, 1), and let M = sup{f(x): x ∈ (0, 1)} and m = inf{f(x): x ∈ (0, 1)}. Prove that for any c with m < c < M, there is a t ∈ (0, 1) such that f(t) = c. Note that we do NOT know that there are any values a or b in(0, 1) such that f(a) = m or f(b) = M, because (0, 1) is not compact.
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