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Question

Find the cartesian form of equation of the straight line z(1i)+¯z(1+i) = 4


A

x - y = 2

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B

x + y = 1

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C

x + y = 2

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D

x - y = 1

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Solution

The correct option is C

x + y = 2


Let z = x+iy

(Z(1i)+¯z(1+i)) = 4
z+¯z+i(¯zz) = 4
2x+i(2yi) = 4
2x+2y = 4
x+y = 2


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