1) How do you calculate the square root of (2-i) ?

2)

Which of the following transformations are linear: (i) Ti : R3 - R' by Ti (u, v, w) = (u - v + 2w,50 - w). (ii) T2 : P(R) - R by T2 (p) = J. 2p(x)dx for a, b E R with a S b. (iii) T3 : P(R) - P(R) by T3 (p(u)) = up(u) + u