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Differential equations - Mu''(t) + ku(t) = 0

Suppose m and k are positive numbers. Find u so that

mu''(t) + ku(t)= 0

for all numbers t and u(0)=1 and u'(0)=2.

(note: u'' = second derivative of u)

Please clarify any shorthand that you are using. Thanks!

Solution Summary

This shows how to solve a problem regarding second derivatives.