Represent \( \frac{5+4 i}{4+5 i} \) in the standard form of \( a+i b \), then the value of \( a+....

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Represent \( \frac{5+4 i}{4+5 i} \) in the standard form of \( a+i b \), then
\( \mathrm{P} \)
the value of \( a+b \) is
W
(1) \( \frac{40}{41} \)
(2) \( \frac{9}{41} \)
(3) \( \frac{31}{41} \)
(4) None of these


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