Arithmetic Progression: [math]{a}_{1}[/math] = ? when [math]{a}_{3}[/math] = x+7 and [math]{a}_{7}[/math] = x+49. How can we solve this question?
Sir..does in separately excited DC generator we have to exite the feild winding continously? EditReply3m ago ￼ Srajan Jain?