Z = f(x, y) = cosh-¹ x-y Given the following: -√y (i) Zx = (ii) Zy 2(x−y) √x (iii) Zx √y 2(x−y) √x Which of the following is correct? A) (i) and (ii)
B) (ii) and (iii)
C) Only (i)
D) Only (ii)
E) Only (iii)