2. Let f be continuous and differentiable everywhere. Suppose that f(-1) = f(1). Show that there are two distinct real numbers x1 and r2 such that f'(x1) = -f'(x2).

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Explain why x1 and x2 exists before proving please. Thank you

2. Let f be continuous and differentiable everywhere. Suppose that f(-1) = f(1). Show that
there are two distinct real numbers x1 and x2 such that f'(x1) = –f'(x2).
Transcribed Image Text:2. Let f be continuous and differentiable everywhere. Suppose that f(-1) = f(1). Show that there are two distinct real numbers x1 and x2 such that f'(x1) = –f'(x2).
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