hsab
hsab
15-07-2016
Mathematics
contestada
What is the unit's digit of 3127 to the power of 173
Respuesta :
Csxl
Csxl
16-07-2016
3127^173 ≡ 7^173 mod 10
Now - let's look at the powers of 7 mod 10:
7^1 = 7 mod 10
7^2 = 49 ≡ 9 mod 10
7^3 ≡ 3 mod 10
7^4 ≡ 1 mod 10
And this cycle repeats. So
7^173 ≡ 7^1 ≡ 7 mod 10
The last digit is 7.
Answer Link
VER TODAS LAS RESPUESTAS ( 44+ )
Otras preguntas
answer this fast hurry
What important things happened during the renaissance?
who Had economic ties to slavery
When an atom in a reactant loses electrons, what happens to its oxidation number? A. Its oxidation number decreases. B. Its oxidation number doubles. C. Its
A rectangle has a width of 5 cm and a length of 10 cm. If the width is increased by 3, how does the perimeter change?
Why are courts often involved in cases concerning eminent domain?
if john prints 10 papers per 18 minutes, how many does he make in 45 minutes?
In the first twenty-four hours after fertilization, the zygote has _________a0. chromosomes.
i need help please.
What is the weight of a 20 kg box on the Earth? A) 2 N B) 20 N C) 200 N
