magnitude

if z1=2-i,z1=1+i find magnitude of z1+z2+1/z1-z2+1

2 Answers

106
Asish Mahapatra ·

z1+ z2+1 = 4 .. (I)
z1-z2+1 = 2-2i .. (II)
So, l(I)/(II)l = l2/(1-i)l = l2l/l1-il = 2/√2 = √2

1
theking ·

no.
my ans is also √2 but given answer is 4√5/5.

It is NCERT problem.

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