Math, asked by balaishu040, 3 months ago

15. limit x->1(x^n-1/x-1)​

Answers

Answered by mathdude500
1

\large\underline\blue{\bold{Given \:  Question :-  }}

\bf \:  ⟼ \bf \:\lim_{x\to\ \: 1}\dfrac{ {x}^{n} - 1 }{x - 1}

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 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:    \:  \:  \: \bf \:\huge \red{AηsωeR } ✍

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\begin{gathered}\Large{\bold{\pink{\underline{Formula \:  Used \::}}}}  \end{gathered}

\bf \:  ⟼ \bf \:\lim_{x\to\ \: a} \: \dfrac{ {x}^{n}  -  {a}^{n} }{x - a}  = n \:  {a}^{n - 1}

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\large\underline\purple{\bold{Solution :-  }}

\bf \:  ⟼ \bf \:\lim_{x\to\ \: 1}\dfrac{ {x}^{n} - 1 }{x - 1}

\bf \:  ⟼ \bf \:\lim_{x\to\ \: 1}\dfrac{ {x}^{n} -  {1}^{n}  }{x - 1}

\bf \:  ⟼  \:  = n \:  {(1)}^{n \:  -  \: 1}

\bf \:  ⟼  \:  = n \:  \times  \: 1

\bf \:  ⟼  \:  =  \: n

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\large{\boxed{\boxed{\bf{Hence, \bf \:  ⟼ \bf \:\lim_{x\to\ \: 1}\dfrac{ {x}^{n} - 1 }{x - 1}  = n}}}}

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