C-05-Q065mediumsingle_mcqThe solutions of x+1y=52, y+1x=3x + \dfrac{1}{y} = \dfrac{5}{2},\ y + \dfrac{1}{x} = 3x+y1=25, y+x1=3 are —a(1,2)(1, 2)(1,2) and (12,1)\left(\dfrac{1}{2}, 1\right)(21,1)