Find the value of 2sgn(0)d[0] + d[1] + d[45], where sgn(x) is the signum function.

Find the value of 2sgn(0)d[0] + d[1] + d[45], where sgn(x) is the sign

1.	Find the value of 2sgn(0)d[0] + d[1] + d[45], where sgn(x) is the signum function.
A.	2
B.	-2
C.	1
D.	0
Answer» E.