How do you go about solving the differential

Mina Whitehead

Mina Whitehead

Answered question

2022-04-12

How do you go about solving the differential equation of the following form?
dydt+y(t)=k, where k is a constant.
Would the method of integrating factors typically used for the following forms work:
dydt+a(t)y=b(t)

Answer & Explanation

Mey9ci0

Mey9ci0

Beginner2022-04-13Added 14 answers

Step 1
Yes, integrating factors will work, here:
dydt+y(t) =keP(t) dt =etet dydt+et y(t) =k etddt[et y(t)] =k etet y(t) =k et+Cy(t) =k+C et.
Step 2
To check, you plug back into the DE:
y˙(t)=Cet,
Therefore y˙(t)+y(t)=Cet+k+Cet=k, as required.

ditumpasz9xj

ditumpasz9xj

Beginner2022-04-14Added 8 answers

Explanation:
You can just integrate by passing everything except the derivative to the other side, i.e
dydt=ka(t)y=(ka(t)) dt=ktA(t)+C
where A(t) is a primitive of a(t) and C is the integration constant.

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