Prove that the eigenvalue problem  y''+ (lamba)y=0,     y(0)=0,       y(1)+y'(1)=0  has no negative eigenvalues. (Suggestion: Show graphically that the only root of the equation tanhz=-z is z=0.)

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter11: Differential Equations
Section11.CR: Chapter 11 Review
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Prove that the eigenvalue problem  y''+ (lamba)y=0,     y(0)=0,       y(1)+y'(1)=0  has no negative eigenvalues. (Suggestion: Show graphically that the only root of the equation tanhz=-z is z=0.)

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