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## Homework Statement

here is my problem :

## Homework Equations

like usual, the problem is related with RLC circuits and transients

## The Attempt at a Solution

from here, the solution is obviously wrong because from the solution, its alpha should be -300 and not -0.4....and from the question it implies that i have to use 1st order differential equation while RLC equations i know use 2nd order differential equations..do you know how to solve this?? thx before