38. the complete integral of the p. d. e 2 2 is +z)p-yx+z)q = z(x - 2z, xyz) = 0 2 +2z, xyz) = 0 a) f(x+y 2 c))f- - 2z, xyz =f0 2 2 2 d))flx-y+ 2z , xyz= 0

38. The complete integral of the p. d. e 2 2 is +z)p-yx+z)q = z(x - 2z, xyz) = 0 2 +2z, xyz) = 0 a) f(x+y 2 c))f- - 2z, xyz =F0 2 2 2 d))flx-y+ 2z , xyz= 0