[tex] \frac{\partial^2 \phi}{\partial x^2} + \lambda \phi = 0 [/tex](adsbygoogle = window.adsbygoogle || []).push({});

We have to analyze eigenvalues.

My prof. gave me this answer for [tex]\lambda>0[/tex] it is

[tex]c*sin(\sqrt(\lambda))x+d*cos(\sqrt(\lambda))x[/tex]

Shouldn't it be -[tex]\lambda[/tex] inside the squareroot? If not can someone explain how he got this?

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# Someone please help me understand this.

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