TS EAMCET 2016 Code A Solved Paper

Section: Mathematics
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Question : 7 of 160
 
Marks: +1, -0
If z=x+iy is a complex number such that
−
z
1
3
=a+ib
then the value of
1
a2+b2
(
x
a
+
y
b
)
=
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