Which of the following statements are true? (a) jvx+y? da =2a (b) where r is the region of the plane given by x+y a. 3 e da = r(1-e) where r is x + y2 a. r (c)

Which of the following statements are TRUE? (A) JVx+y? dA =2a (B) where R is the region of the plane given by x+y a. 3 e dA = r(1-e) where R is x + y2 a. R (C) ffye dx dy = (e-1) (D) None of these