Yahoo Answers akan ditutup pada 4 Mei 2021 dan situs web Yahoo Answers sekarang tersedia dalam mode baca saja. Tidak akan ada perubahan pada properti atau layanan Yahoo lainnya, atau akun Yahoo Anda. Anda dapat memperoleh informasi lebih lanjut tentang penutupan Yahoo Answers dan cara mengunduh data Anda di halaman bantuan ini.
2 Jawaban
- PaulLv 47 tahun yang laluJawaban Favorit
As was mentioned above, the "units" digit will be 6 for any power of a positive integer ending in 6. This can be illustrated by showing that the product of any two such numbers ends in 6
Consider any two (not necessarily distinct) positive integer "k_1" and "k_2" with the property that the unit digit is 6. Then there exist integers m and n such that:
k_1 = 10m + 6 and k_2 = 10n + 6
(k_1)*(k_2)
= (10m + 6)(10n + 6)
= 100 mn + 60m + 60n + 36
= 10 [ 10mn + 6m + 6n + 3 ] + 6 (hence, it has an ending digit of 6)
Now, since any (positive integer) power of such a number is simply a product of this number with itself (2 or more times) the product will also end in 6.
- Anonim7 tahun yang lalu
The units digit in any power of 6, or even a number ending in 6, is still 6. Check out few and you will see that.
Numbers ending in 1 and 5 also have that property.