1.

Consider the two complex numbers z and w, such that w=(z-1)/(z+2)=a+ib, " where " a,b in R " and " i=sqrt(-1). Which of the following equals to abs(z)?

Answer»

`ABS(W)`
`(a+1)^(2)+B^(2)`
`a^(2)+(b+2)^(2)`
`(a+1)^(2)+(b+1)^(2)`

ANSWER :B


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