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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: Find the General Solution
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Utsav55 (253)

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Find the General Solution of:


(y) / (d) = e^(-2x)


Explain also.


 


Thanks

    
kushi12 (481)

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just trying


the given expression can be written as



d(dy)=x(e^-2x)dx


dy=int((x)(e^-2x)dx


by applying by parts


dy=x(e^-2x/-2)-(e^-2x/-2)


y=int(x(e^-2x/-2)+(e^-2x/2))


y=int(x)(e^-2x/-2)+int(e^-2x/2)


in 1st int apply by parts and sec simple int to get general soln


y=x(e^-2x/-2)-(e^-2x/-2)+e^-2x/-4)

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iitkgp_bipin (6498)

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d2y/dx2 = e-2x


d(dy/dx) = e-2x.dx


Integrate both the sides :


dy/dx = -e-2x/2 + c


dy = (-e-2x/2 + c)dx


Again integrate both the sides ;


y = e-2x/4 + cx + d where c and d are the constants of integration.


 


 


Bipin Kumar Dubey
Chemical Dept.
IIT Kharagpur

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Utsav55 (253)

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thanks I got the answer.
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