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Continuity And Differentiability

Question
CBSEENMA12034717

Differentiate x(1 + log x)w.r.t.x.

Solution
Let space space space space space space straight y equals straight e to the power of straight x left parenthesis 1 plus log space straight x right parenthesis end exponent
therefore space dy over dx equals straight e to the power of straight x left parenthesis 1 plus log space straight x right parenthesis end exponent. straight d over dx left square bracket straight x left parenthesis 1 plus log space straight x right parenthesis right square bracket
space space space space space space space space space space space space space equals straight e to the power of straight x left parenthesis 1 plus log space straight x right parenthesis end exponent. open square brackets straight x straight d over dx left parenthesis 1 plus log space straight x right parenthesis plus left parenthesis 1 plus log space straight x right parenthesis. straight d over dx left parenthesis straight x right parenthesis close square brackets
space space space space space space space space space space space space space equals straight e to the power of straight x left parenthesis 1 plus log space straight x right parenthesis end exponent. open square brackets straight x.1 over straight x plus left parenthesis 1 plus log space straight x right parenthesis.1 close square brackets
space space space space space space space space space space space space space equals straight e to the power of straight x left parenthesis 1 plus log space straight x right parenthesis end exponent. left square bracket 1 plus 1 plus log space straight x right square bracket equals straight e to the power of straight x left parenthesis 1 plus log space straight x right parenthesis end exponent left parenthesis 2 plus log space straight x right parenthesis

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