1.

If `z_1=2-i , z_2=1+i ,`find `|(z_1+z_2+1)/(z_1-z_2+i)|`

Answer» Correct Answer - `2 sqrt(2)`
`(z_(1)+z_(2)+1)/(z_(1)-z_(2)+i)=((2-i)+(1+i)+1)/((2-i)-(1+i)+i)=(4)/((1+i))xx((1-i))/((1-i))=2(1-i)`
`rArr" "|(z_(1)+z_(2)+1)/(z_(1)-z_(2)+i)|=2 xx sqrt(1+(-1)^(2))=2sqrt(2)`.


Discussion

No Comment Found