In how many hours will the count reach 2,00,000, if the rate of growth of
bacteria is proportional to the number present 23 The general solution of the differential equation 
x
y
dy
e
dx
+
=
 is
(A) ex + e–y = C
(B) ex + ey = C
(C) e–x + ey = C
(D) e–x + e–y = C
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