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-- Mathematics - Section A
Differential Equations
Which of the following is the differential equation whose solution is \[y = { e }^{ -x } + 1000\]
y-y' = 1000
y+y' = 1000
y - y'' = 1000
y + y'' = 1000
$ y '' = e ^{ -x } $
$\Rightarrow y - y'' = 1000$