Using the extended Euclidean algorithm, find the multiplicative inverse of a) 1234 mod 4321
The greatest common factor (GCF), also known as the greatest common divisor (GCD), represents the largest number that divides into each member of a set of numbers. Smaller GCFs can be quickly calculated using the prime factors of each number, but calculating large GCFs the same way is sometimes difficult. An algorithm devised by Euclid, (the ladder) lets you find the GCF of any number without extensive factoring. All you need is the ability to do long division.
Euclid's algorithm is a popular algorithm to compute the GCD of two numbers. Algorithm: Gcd(a,b) = Gcd(b, a mod b), where a>=b and Gcd(a,0) = a Say we want to find the GCD of 72 and 105. 105 mod 72 = 33, so GCD(72,105) = GCD(33,72) 72 mod 33 = 6, so GCD(33,72) = GCD(6,33) 33 mod 6 = 3 so GCD(6,33) = GCD(3,6) 6 mod 3 = 0 so GCD(3,6) = GCD(0,3) = 3. So the GCD of 72 and 105 is 3.
Use the division algorithm. If b = pa + r, then gcd(b,a) = gcd(a,r). Then you can apply the division algorithm again with a = qr + r' and gcd(a,r) = gcd(r, r'). Note that each time the square norm of the remainder gets smaller and smaller, so eventually this process will terminate and you can get the answer. Here, it should be 1.
While Euclid was famed for his development and presentation of geometry to the ancient Greek world, it was Archimedes who made a direct contribution to the discovery of pi.I suggest you find an online summary of Euclid's Elementsand use that as a resource.
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Using the extended Euclidean algorithm, find the multiplicative inverse of a) 1234 mod 4321
Euclid's algorithm is a time-tested method for finding the greatest common divisor (GCD) of two numbers. It's based on the principle that the greatest common divisor of two numbers also divides their difference. This algorithm is efficient and works well for large numbers, making it a practical choice in numerous applications. The algorithm operates in a recursive or iterative manner, continually reducing the problem size until it reaches a base case. Here’s how Euclid's algorithm works: print (gcd (a, b) ) # Output: 3ere >a>b , subtract b from a. Replace a with (a−b). Repeat this process until a and b become equal, at which point, a (or b) is the GCD of the original numbers. A more efficient version of Euclid’s algorithm, known as the Division-based Euclidean Algorithm, operates as follows: Given two numbers a and b, where >a> b, find the remainder of a divided by b, denoted as r. Replace a with b and b with r. Repeat this process until b becomes zero. The non-zero remainder, a, is the GCD of the original numbers. In this example, even though a and b are large numbers, the algorithm quickly computes the GCD. The division-based version of Euclid’s algorithm is more efficient than the subtraction-based version, especially for large numbers, as it reduces the problem size more rapidly. Euclid's algorithm is a fundamental algorithm in number theory, with applications in various fields including cryptography, computer science, and engineering. Its efficiency and simplicity make it a powerful tool for computing the GCD, even for large numbers.
It's the same as gcf(gcf(75, 100), 175). In other words, you can first use Euclid's algorithm to find the gcf of 75 and 100; then you can calculate the gcf of the result with 175. To help you get started, by Euclid's algorithm, the gcf of 75 and 100 is the same as the gcf of 75 and 25 (where 25 is the remnainder of the division of 100 / 75).
If you use methods based on prime factors, it is the same whether you have 2, 3, or more numbers: find all the factors that occur in any of your numbers. If you use a method based on Euclid's Algorithm (that is, lcm(a, b) = a x b / gcf(a, b), where you find the gcf with Euclid's Algorithm), then you can find the lcm for two numbers at a time. For example, to get the lcm of four numbers, find the lcm of the first two, then the lcm of the result and the third number, than the lcm of the result and the fourth number.
225=135*1+110 135=110*1+25 110=25*4+10 25=10*2+5 10=5*2+0 so, the HCF of 135 and225 is 5.
You can find several Euclid biographies on the Internet, or look in an encyclopedia.
The greatest common factor (GCF), also known as the greatest common divisor (GCD), represents the largest number that divides into each member of a set of numbers. Smaller GCFs can be quickly calculated using the prime factors of each number, but calculating large GCFs the same way is sometimes difficult. An algorithm devised by Euclid, (the ladder) lets you find the GCF of any number without extensive factoring. All you need is the ability to do long division.
Euclid's algorithm is a popular algorithm to compute the GCD of two numbers. Algorithm: Gcd(a,b) = Gcd(b, a mod b), where a>=b and Gcd(a,0) = a Say we want to find the GCD of 72 and 105. 105 mod 72 = 33, so GCD(72,105) = GCD(33,72) 72 mod 33 = 6, so GCD(33,72) = GCD(6,33) 33 mod 6 = 3 so GCD(6,33) = GCD(3,6) 6 mod 3 = 0 so GCD(3,6) = GCD(0,3) = 3. So the GCD of 72 and 105 is 3.
Write an algorithm to find the root of quadratic equation
None is particularly hard if you use Euclid's algorithm to find the greatest common factor first, then use the fact that for any two numbers "a" and "b": lcm(a, b) x gcf(a, b) = a x b.
To help people find the weakness of the algorithm