If `(5z_1)/(7z_2)` is purely imaginary then `|(2z_1+3z_2)/(2z_1-3z_2)|=`

If (5z_2)/(7z_1) is purely imaginary , then |(2z_1+3z_2)/(2z_1-3z_2)|=

If (5z_2)/(7z_1) is purely imaginary, then |(2z_1+3z_2)/(2z_1-3z_2)|= (A) 5/7 (B) 7/9 (C) 25/49 (D) 1

if (5z_2)/(7z_1) is purely imaginary number then |(2z_1+3z_2)/(2z_1-3z_2) | is equal to

If (2z_1)/(3z_2) is purely imaginary then |(z_(1)-z_(2))/(z_(1)+z_(2))|

If (z-1)/(z+1) is purely imaginary, then |z|=

If z_(1) and z_(2) are complex number and (z_(1))/(z_(2)) is purely imaginary then |((z1+z2)/(z1-z2))|=

If (5z_(2))/(7z_(1)) is purely imaginary,then |(2z_(1)+3z_(2))/(2z_(1)-3z_(2))|=(A)(5)/(7)(B)(7)/(9)(C)(25)/(49)(D)1