Ex 9.5, 2 - Find general solution: dy/dx + 3y = e-2x - Ex 9.5 - Ex 9.5

part 2 - Ex 9.5, 2 - Ex 9.5 - Serial order wise - Chapter 9 Class 12 Differential Equations

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Ex 9.5, 2 For each of the differential equation , find the𝑑𝑦/𝑑π‘₯+3𝑦=𝑒^(βˆ’2π‘₯) Step 1: Put in form 𝑑𝑦/𝑑π‘₯ + Py = Q π’…π’š/𝒅𝒙 + 3y = 𝒆^(βˆ’πŸπ’™) Step 2: Find P and Q by comparing, we get 𝑷=πŸ‘ and Q = 𝒆^(βˆ’πŸπ’™) Step 3 : Find Integrating factor, I.F. I.F. = 𝑒^∫1▒𝑝𝑑π‘₯ I.F. = 𝑒^∫1β–’3𝑑π‘₯ general solution : 𝑑𝑦/𝑑π‘₯+3𝑦=𝑒^(βˆ’2π‘₯) I.F. = 𝒆^πŸ‘π’™ Step 4 : Solution of the equation y Γ— I.F. = ∫1▒〖𝑄×𝐼.𝐹. 𝑑π‘₯+𝑐〗 Putting values y Γ— e3x = ∫1▒𝒆^(βˆ’πŸπ’™ + πŸ‘π’™) ,dx + 𝒄 ye3x = ∫1▒𝑒^(π‘₯ ) dx + 𝑐 ye3x = 𝑒^(π‘₯ ) dx + 𝑐 Dividing by 𝑒^(3π‘₯ ) y = e–2x + Ce–3x

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