If `z=(3+4i)/i`,then find `|z|`

If z=(3+4i)/(5i) then find zbar z

In z=5/(1-3i) then find z.bar z .

If sin^(-1) x +sin^(-1)y +sin^(-1) z =(3pi)/(2) , then find the value of x^(100) +y^(100) +z^(100) -(9)/(x^(101)+y^(101)+z^(101)) .

Find x+y+z

If z=1-i ,then mention the value of arg(z).

If z=1+i ,then mention the value of arg(z) .

If [(5,3x),(2y,z)]=[(5,4),(12,6)] , then find y.

If A=[(1,2),(3,4)] , find a matrix B such that AB=I .

If 1/2 , x, y, z, 128 are in G.P., then find x,y,z,

In the series Sc(Z = 21) to Zn (Z =30), the enthalpy of atomization of zinc is the lowest i.e. 126 kJ mol^(-1) . Why?