define modulus function
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Step-by-step explanation:
when you write ab(modn) you're referring to a number k such that bk≡a(modn) but you should pay attention that this fraction is defined if and only if gcd(b,n)=1. In other words, the denominator must be relatively prime to the modulus. ... The x in this equation will give you b−1.
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In mathematics, the absolute value or modulus of a real number x, denoted |x|, is the non-negative value of x without regard to its sign. Namely, |x| = x if x is positive, and |x| = −x if x is negative, and |0| = 0. For example, the absolute value of 3 is 3, and the absolute value of −3 is also 3
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