Which of the following cannot be the Fourier series expansion of a periodic signals? Select one: OA. x(t) = 2 cos t +3 cos 3t OB. 2(t) = cost + 0.5 OC. r(t) 2 cos 1.5at + sin 3.5at = OD. #(t) = 2 cos Tt + 7 cost %3D A B

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Which of the following cannot be the Fourier series expansion of a periodic signals?
Select one:
OA. (t) = 2 cos t +3 cos 3t
%3D
OB. æ(t) = cost + 0.5
В.
OC. r(t)
2 cos 1.5rt + sin 3.5rt
D. x(t) = 2 cos rt + 7 cost
%3D
A O
B
D
The polynomial p(x) = x5 + x + 2 has
A. all real roots
B. 3 real and 2 complex roots
O C. 1 real and 4 complex roots
D. all complex roots
A O
B
C
Transcribed Image Text:Which of the following cannot be the Fourier series expansion of a periodic signals? Select one: OA. (t) = 2 cos t +3 cos 3t %3D OB. æ(t) = cost + 0.5 В. OC. r(t) 2 cos 1.5rt + sin 3.5rt D. x(t) = 2 cos rt + 7 cost %3D A O B D The polynomial p(x) = x5 + x + 2 has A. all real roots B. 3 real and 2 complex roots O C. 1 real and 4 complex roots D. all complex roots A O B C
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