Which one(s) of the following functions is linear?
a) 
.
b) 
.
c) 
.
d) 
.
e) 
.
f) 
.
g) 
.
h) 
.
i) 
.
j) 
.
k) 
. (
is an arbitrary constant).
Solution
a) Linear
b) Linear
c) Linear
d) Nonlinear
e) Linear
f) Nonlinear
g) Nonlinear
h) Nonlinear
i) Nonlinear
j) Linear
k) Linear