Business Driven Information Systems
6th Edition
ISBN: 9781260004717
Author: Paige Baltzan
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Question
Chapter 4, Problem 3CCT
To determine
To discuss:
Use of authorization and authentication technologies to prevent information theft in a business.
Expert Solution & Answer
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Students have asked these similar questions
Example
Solve the octic polynomial
2x⁸-9x⁷+20x⁶-33x⁵+46x⁴-66x³+80x²-72x+32=0
Solution
Divide by x⁴
2x⁴-9x³+20x²-33x+46-66/x + 80/x² - 72/x³ + 32/x⁴=0
Combine and bring terms
2(x⁴+16/x⁴) - 9(x³+8/x³) +20(x²+4/x²)-33(x+2/x) + 46= 0
Let use substitution
Let x+2/x =u
(x+2/x)²= u²
x²+2x*2/x + 4/x² = u²
x²+4/x²= u²-4
(x+2/x)³= x³+8/x³+3x*2/x(x+2/x)
u³= x³+8/x²+6u
x³+8/x³= u³-6u
(x²+4/x²)²= x⁴+2x²*4/x² + 16/x⁴
(u²-4)²= x⁴+16/x⁴ + 8
x⁴+16/x⁴ = (u²-4)²-8
x⁴+16/x⁴ = u⁴-8u²+8
2(u⁴-8u²+8)-9(u³-6u)+20(u²-4)-33u+46=0
Expand and simplify
2u⁴-9u³+4u²+21u-18=0
After checking
(u-1)(u-2) Are factors
Then
2u²-3u-9=0
u=3, u=-3/2
Assignment question
Solve the octic polynomial
2s⁸+s⁷+2s⁶-31s⁴-16s³-32s²-160=0 using the above example question, please explain in detail
please explain each method used, thank you
b)
Another waveform g(t) is defined by
=0
t≥0, α>0
otherwise
g(t)= At exp(-at)
and is plotted in Figure 1 (for representative values of 4 = 1 and α = 1).
g(t)
0.4T
0.3+
0.2
0.1+
2
0
2
Figure 1
8
c)
Show that its amplitude spectrum is |G(@)| = -
A
(a²+0²)²
Describe briefly, with the aid of labelled sketches, how changing a affects
the waveform in both the time and frequency domains.
d) Deduce the Fourier transform H(@) of h(t) = g(t)+g(t+b)+g(t-b) and
calculate its DC amplitude H(0).
Chapter 4 Solutions
Business Driven Information Systems
Ch. 4 - Prob. 1OCQCh. 4 - Prob. 2OCQCh. 4 - Prob. 3OCQCh. 4 - Prob. 4OCQCh. 4 - Prob. 5OCQCh. 4 - Prob. 6OCQCh. 4 - Prob. 1RQCh. 4 - Prob. 2RQCh. 4 - Prob. 3RQCh. 4 - Prob. 4RQ
Ch. 4 - Prob. 5RQCh. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Prob. 8RQCh. 4 - Prob. 9RQCh. 4 - Prob. 10RQCh. 4 - Prob. 11RQCh. 4 - Prob. 12RQCh. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Prob. 1CCOCh. 4 - Prob. 2CCOCh. 4 - Prob. 3CCOCh. 4 - Prob. 4CCOCh. 4 - Prob. 1CCTCh. 4 - Prob. 2CCTCh. 4 - Prob. 3CCTCh. 4 - Prob. 4CCTCh. 4 - Prob. 5CCTCh. 4 - Prob. 6CCTCh. 4 - Prob. 1CBTCh. 4 - Prob. 2CBTCh. 4 - Prob. 3CBTCh. 4 - Prob. 4CBTCh. 4 - Prob. 5CBTCh. 4 - Prob. 6CBTCh. 4 - Prob. 7CBTCh. 4 - Prob. 8CBTCh. 4 - Prob. 9CBTCh. 4 - Prob. 10CBTCh. 4 - Prob. 11CBTCh. 4 - Prob. PIAYKBPCh. 4 - Prob. PIIAYKBPCh. 4 - Prob. PIIIAYKBPCh. 4 - Prob. PIVAYKBPCh. 4 - Prob. PVAYKBP
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