Answer
1000
Work Step by Step
We know that $\lim\limits_{x \to a}\frac{x^{n}-a^{n}}{x-a}= na^{n-1}$
By the theorem above, $\lim\limits_{x \to 1}\frac{x^{1000}-1^{1000}}{x-1}$ = $1000×1^{999}$ = 1000
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.