f a complex number Z is purely real, then conjugate of Z is *
-Z
Z
0
None of these
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Given : complex number Z is purely real,
To find : conjugate of Z
Z
Z
0
None of these
Solution
Let say complex number Z is x + iy
Z = x + i y
x - real part
y - imaginary
Conjugate of Z will be
x - i y
complex number Z = x + i y is purely real
=> y = 0
Z = x + i y = x
Conjugate of Z = x - iy = x
x = x
=> Z = Conjugate of Z
conjugate of Z is Z
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