@@Nallasivam ok sir , if a firm again and again changes his plant size to minimise it's cost then it's fixed cost automatically getting rise.then which prospective firms is minimising cost । I cant understand it I'll try to know to from ur video but this question also strikes my brain ।।
sir one confusion remains as to why short run average cost curves left to minima of long run average cost curve are tangent on their falling part why the producer will remain on previous plant till the intersection of previous plant curve with next one
