Look how cute this is!
it's stupid nigga
>>7854662
where do you see a problem?
>>7854666
You are retarded if can't find it.
>>7854813
Lets hear them, then
>>7854813
you mean in the language or in that it's not valid?
>>7854662
did all you already observe this?
am I stupid for liking this?
Is it only supposed to work with natural numbers between 0 and 9?
>>7855078
13^5
=371293
are you baiting?
>>7855113
no, i proved it works with all integers. If you simply flip the signs in the proof you will also see that it works for negative numbers too.
>>7855228
n = 13
>last digit ends in n
Only way to take this is that last digits end in 13, which it doesnt.
If you think I don't see that it ends in 3 you're mistaken, but that's not what the proposition states
>>7855248
Its a lack of rigour in my phrasing, but its heavily implied.
>>7855256
The cool thing about math is that implications can be stated and proved.
There is literally no reason a reader should make assumptions.
>>7855256
OP what's this "TD" bullshit. Do everything modulo 10.
Interesting OP. Never noticed this before.
>>7854658
89^5 = 5584059449
Your proof is wrong. I think you should try to prove that the integer in the position of the units determines the final digit, which is kinda obvious.
>>7855278
Not OP but in my textbooks Ive seen it written in TD notation.
>>7854658
>10^5
fixed
Your handwriting is ugly as shit. Work on it and I'll read your proof.
