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| 1. |
Evaluate `lim_(xrarra){(x^(12)-a^(12))/(x-a)}.` |
| Answer» `lim_(xtoa){(x^(12)-a^(12))/(x-a)}=12a^((12-1))=12a^(11)" "[becauselim_(xtoa)((x^(n)-a^(n))/(a-x))=na^(n-1)].` | |