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if x=9^(1/3)9^(1/9)9^(1/27)…..infty,y=4^...

if `x=9^(1/3)9^(1/9)9^(1/27)…..infty,y=4^(1/3)4^(1/9)4^(1/27)…..infty` and`z=underset(r=1)oversetinftysum(1+i)^(-r)`then arg(x+yz) is equal to

A

0

B

`pi-tan^(-1)(sqrt2/3)`

C

`(-tan^(-1)(sqrt2/3)`

D

None of these

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The correct Answer is:
C
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PATHFINDER-COMPLEX NUMBER-QUESTION BANK
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  11. If (1+2i)/(2+i)=r(costheta+isintheta) then

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  16. If z1,z2 are two non zero complex numbers such that z1/z2+z2/z1=1 then...

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