English: We have denominator × the derivative of the numerator, which turns out to be R_(L) + R_(th) square × the derivative of RL which is 1 - the numerator R_(L) × the derivative of the denominator, which is 2 × R_(L) + R_(th).
Telugu: అది (R_(L)+R_(th))² × R_(L) యొక్క డిరెవేటివ్ అంటే 1 - లవం R_(L)× హారం యొక్క డిరెవేటివ్ అంటే 2 ×( R_(L) + R_(th))గా ఉంటుంది.