Solve the problem.An object undergoes oscillatory motion about its equilibrium position according to the following functional relationship between its instantaneous displacement, f(t), and time, t:f(t) = ?2t - t3 -? ? t < ? ,where t = 0 marks a reference point in time that is not necessarily the beginning of oscillation.Find ao (if it is not zero), three nonzero cosine terms (if they exist), and three nonzero sine terms (if they exist) of the Fourier series for this description of motion.
A. f(t) = 3 + 12
B. f(t) = 3 - 12
C. f(t) = 12
D. f(t) = 12
Answer: D
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