

MCQOPTIONS
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1. |
Which of the following is the valid differential equation x = a cos(αt + β)? |
A. | d2x/dt2 – αx = 0 |
B. | d2x/dt2 + αx = 0 |
C. | d2x/dt2 – α2x = 0 |
D. | d2x/dt2 + α2x = 0 |
Answer» E. | |