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\( \lim _{x \rightarrow \infty}\left(\left(1-x^{3}\right)^{1 / 3}-a x-b\right)=2 \quad a \& b=? ? \) |
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Answer» lim 1−x −2/3 1−x −1/3 Here putting the limit x→1 we get 0 0 from (undefined form ) None we can apply L-Hospital Rule ⇒ x→1 lim d(1−x −2/3 ) d(1−x 1−/3 ) ⇒ x→1 lim 0−( 3 −2 x −2/3 −1) 0−( 3 −1 x −1/3−1 ) { dx d (x n )=nx n−1 =d(x) n ⇒ x→1 lim + 3 2 x −5/3 + 3 1 x −4/3 ⇒ x→1 lim 2 1 x −4/3 + 3 5 ⇒ x→1 lim 2 1 x 3 1 ⇒ 2 1 (1) 1/3 ⇒ 2 1 |
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