How can I see the solution of Modern Engineering Mathematics_6th_Edition (2020) (Complex Numbers)

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Nguyen
Nguyen 2025-9-29，7:32
评论： Sam Chak 2025-9-29，9:46
I am doing my homework and see check answer using MATLAB. But I didn't see the answers any where. Please help me?

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Rik
Rik 2025-9-29，8:24
Ran in:
You can find guidelines for posting homework on this forum here. If you have trouble with Matlab basics you may consider doing the Onramp tutorial (which is provided for free by Mathworks). If your main issue is with understanding the underlying concept, you may consider re-reading the material you teacher provided and ask them for further clarification.
In this case, your task is to do the calculation, and to implement the very same thing in Matlab. So for 1f you would do this:
z=4+3j,w=2-j
z = 4.0000 + 3.0000i
w = 2.0000 - 1.0000i
w/z
ans = 0.2000 - 0.4000i
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Sam Chak
Sam Chak 2025-9-29，9:12
Ran in:
I suspect that refers to the complex conjugate. If you enter w* literally, you will not obtain the desired result.
w = 2 - j
w = 2.0000 - 1.0000i
conj(w)
ans = 2.0000 + 1.0000i
Sam Chak
Sam Chak 2025-9-29，9:46
Ran in:
Q11 is slightly tricky. Basically, you need to prove that implies , or vice versa. The Symbolic Math Toolbox will be helpful for this question.
syms x y real
syms z
% Let
z = x + y*sym('1i')
z = 
% Calculate the magnitude
magnitude_z1 = abs(z + 1)
magnitude_z1 = 
magnitude_z2 = abs(z - 1)
magnitude_z2 = 
% Left hand side
lhs = magnitude_z1^2
lhs = 
% Right hand side
rhs = magnitude_z2^2
rhs = 
% Inequality
ieq = lhs > rhs
ieq = 
ieq = simplify(ieq)
ieq = 
ieq = expand(ieq)
ieq = 
ieq = simplify(ieq)
ieq = 

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