Question: Determine whether the differential equation is linear. a. y' + y = 1 b. y' = x - y c. xy' + y = x

Determine whether the differential equation is linear.
a. y' + y = 1
b. y' = x - y
c. xy' + y = √x
d. sin x dy / dx (cos x) y = sin(x2)
e. (1 + t) du / dt + u = 1 + t, t > 0

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