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Q.

The ascending order of the value of

z1=1+i4, z2=3+i12, z3=1+i39

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a

z3, z1, z2

b

z1, z2, z3

c

z1, z3, z2

d

z2, z3, z1

answer is C.

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Detailed Solution

z1=(1+i)4=2412+i24 =22cos π4+i sin π44 =4 cos π+i sin π=4(-1)=-4

z2=3+i12 =21232+i212 =212cosπ6+i sinπ612 =212cos2π+i sin2π=212(1)=212

z3=1+i39 =2912+i329 =29cosπ3+i sin π39 =29cos 3π+i sin3π =29(-1+i(0)) =-29

  Ascending order is z3<z1<z2

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