[" 3.For the following APs,write the first term and the common difference: "],[" (i) "3,1,-1,-3,...],[" (ii) "-5,-1,3,7,...],[" (iii) "(1)/(3),(5)/(3),(9)/(3),(13)/(3),...],[" (iv) "0.6,1.7,2.8,3.9,...]