Find the transform of the given function of s.F 
= 
A. f 
= 
e-2t - 
e6t + 
e7t
B. f 
= 
e-2t - 
e6t + 
e7t
C. f 
= 
e2t - 
e-6t + 
e-7t
D. f 
= 
e-2t - 
e6t + 
e7t
Answer: D
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