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| 1. |
Show that 15 power n can never end up with zero |
| Answer» 15n\xa0= 15\xa0* 15 * 15 * 15 *15 *15 *............... nLet n = 1 => 15For n = 2,\xa0=> 225For n = 3, => 3375\xa0Plz note that for every value of n, the last digit ends with 5 everytime, thus the last digit will never be other than 5.\xa0 | |