ok so how many prime factors can u find of 3 (to the 30th power) minus 1 without a calculator?? i need an explanation 2 plz
thxx!!
2007-10-06 07:24:10 · 3 answers · asked by XXyeaaboiiiXX 2 in Science & Mathematics ➔ Mathematics
I will offer some hints, such as 3^30 is a square number, and so is 1. This rule should help you factor the number:
x^n - 1 = (x - 1)(x^(n-1) + x^(n-2) + ... + x^2 + x + 1)
2007-10-06 07:40:32 · answer #1 · answered by J Bareil 4 · 1⤊ 1⤋
3^30-1 = (3^15 -1)(3^15+1)
= (3^5 +1)(3^10 -3^5*1+1)(3^5-1)(3^10 +3^5+1)
3^5+1 = 244 = 2*2*61, so there's 3 factors
(3^10-3^5+1)= 58807 = 7*31*271, so there's 3 more.
You can find the rest.
2007-10-06 07:45:00 · answer #2 · answered by ironduke8159 7 · 1⤊ 0⤋
P(precisely One does now no longer function suitable) = P(one does now no longer function suitable) + P(2 function suitable) P(precisely One does now no longer function suitable) = a million/5 + 2/5 P(precisely One does now no longer function suitable) = 0.6
2016-10-10 10:22:22 · answer #3 · answered by ? 4 · 0⤊ 0⤋