(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The total charge that has entered a circuit element is q(t)=2(3 − e[tex]^{-4t}[/tex]) when t≥0 and

q(t)=0 when t<0. Determine the current in this circuit element for t≥0.

2. Relevant equations

Differentiation

3. The attempt at a solution

i(t) = 2(4e[tex]^{-4t}[/tex]) + 3 - e[tex]^{-4t}[/tex]

i(t) = 7e[tex]^{-4t}[/tex] + 3

However the answer says 8e[tex]^{-4t}[/tex]

What have I done wrong?

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# Homework Help: Total charge in a circuit

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