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  • i^ + i^  = 2i^  --->  since  i^ is unit vector in x-axis it has magnitude of 1 and direction in x axis,    
  •  whereas | i^ + i^ | = sqrt( 1^2 + 1^2) = 2.. since  we are squaring the component of i^ which is 1                                                      

 

 

 

 

Answer

i+i=2i

|i+i|=|2i|=(0^2+2^2)^(1/2)=2

Answer

1. Here you can only sum i+i i.e. 2i and this is the answer.

2. here you want to know the magnitude of i+i.

so the result is |i+i|=|2i|=2|i|=2 as you know the magnitude of a unit vector is 1.

Answer
Questions on modulus in complex no topics can be rapidly visualised taking triangle route and apply pythagors theo x=0 imaginary axis y=2, take root(x square +y square)
Answer

i + i that is the sum of two unit vector so = 2i , I am not giving the cap above i here.

|i + i| i.e the modulus of sum of this twp unit vector so,  |2i| = sqrt(2^2)=sqrt(4)=2

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