- #1
drawar
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Homework Statement
Given 2 functions f(x) and g(x) that are differentiable everywhere on R and f′(x) = g(x) and g′(x) = −f(x). Prove that
1. Between any two consecutive zeros of f(x)=0 there is exactly one zero of g(x)=0,
2. Between any two consecutive zeros of g(x)=0 there is exactly one zero of f(x)=0.
Homework Equations
The Attempt at a Solution
I guess the first question has something to do with Rolle's Theorem but the theorem only states that there exists a zero of f'(x)=0 between 2 zeros of f(x), without mentioning about the uniqueness of that zero. Also I have trouble tackling the second question. Any help is appreciated, thanks!