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Continuity And Differentiability

Question
CBSEENMA12035118

Differentiate the following functions w.r.t.x: cot to the power of negative 1 end exponent square root of fraction numerator 1 plus straight x over denominator 2 end fraction end root

Solution
Let space space space space space straight y equals cot to the power of negative 1 end exponent square root of fraction numerator 1 plus straight x over denominator 2 end fraction end root
therefore space dy over dx equals fraction numerator 1 over denominator 1 plus open parentheses square root of begin display style fraction numerator 1 plus straight x over denominator 2 end fraction end style end root close parentheses squared end fraction straight d over dx open parentheses square root of fraction numerator 1 plus straight x over denominator 2 end fraction end root close parentheses equals negative fraction numerator 1 over denominator 1 plus begin display style fraction numerator 1 plus straight x over denominator 2 end fraction end style end fraction cross times fraction numerator 1 over denominator square root of 2 end fraction straight d over dx left parenthesis square root of 1 plus straight x end root right parenthesis
space space space space space space space space space space space space space equals negative fraction numerator 2 over denominator 2 plus 1 plus straight x end fraction cross times fraction numerator 1 over denominator square root of 2 end fraction cross times fraction numerator 1 over denominator 2 square root of 1 plus straight x end root end fraction equals negative fraction numerator 1 over denominator left parenthesis 3 plus straight x right parenthesis square root of 2 square root of 1 plus straight x end root end fraction

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