Let Ebe the set of even integers with ordinary addition. Define a new multiplication on E by the rule Tawbi- ab/2" (where the product on the right is ordinary multiplication). Prove that with these operations Eisa commutative ring with identity
Family of Curves
A family of curves is a group of curves that are each described by a parametrization in which one or more variables are parameters. In general, the parameters have more complexity on the assembly of the curve than an ordinary linear transformation. These families appear commonly in the solution of differential equations. When a constant of integration is added, it is normally modified algebraically until it no longer replicates a plain linear transformation. The order of a differential equation depends on how many uncertain variables appear in the corresponding curve. The order of the differential equation acquired is two if two unknown variables exist in an equation belonging to this family.
XZ Plane
In order to understand XZ plane, it's helpful to understand two-dimensional and three-dimensional spaces. To plot a point on a plane, two numbers are needed, and these two numbers in the plane can be represented as an ordered pair (a,b) where a and b are real numbers and a is the horizontal coordinate and b is the vertical coordinate. This type of plane is called two-dimensional and it contains two perpendicular axes, the horizontal axis, and the vertical axis.
Euclidean Geometry
Geometry is the branch of mathematics that deals with flat surfaces like lines, angles, points, two-dimensional figures, etc. In Euclidean geometry, one studies the geometrical shapes that rely on different theorems and axioms. This (pure mathematics) geometry was introduced by the Greek mathematician Euclid, and that is why it is called Euclidean geometry. Euclid explained this in his book named 'elements'. Euclid's method in Euclidean geometry involves handling a small group of innately captivate axioms and incorporating many of these other propositions. The elements written by Euclid are the fundamentals for the study of geometry from a modern mathematical perspective. Elements comprise Euclidean theories, postulates, axioms, construction, and mathematical proofs of propositions.
Lines and Angles
In a two-dimensional plane, a line is simply a figure that joins two points. Usually, lines are used for presenting objects that are straight in shape and have minimal depth or width.
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with ordinary addition and this new multiplication, Z is a commutative ring.
18. Define a new multiplication in Z by the rule: ab = 1 for all a, b, EZ. With
ordinary addition and this new multiplication, is Z is a ring?
19. Let S = {a, b, c} and let P(S) be the set of all subsets of S; denote the
elements of P(S) as follows:
S = {a, b, c}; D = {a, b}; E= {a, c}; F= {b, c};
A = {a}; B= {b}; C= {c}; 0 =Ø.
Define addition and multiplication in P(S) by these rules:
M + N = (M – N)U (N – M)
and
MN = MN N.
Write out the addition and multiplication tables for P(S). Also, see Exercise 44.
B. 20. Show that the subset R = {0, 3, 6, 9, 12, 15} of Z1g is a subring. Does R have
an identity?
21. Show that the subset S = {0, 2, 4, 6, 8} of Z10 is a subring. Does S have an
identity?
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56
Chapter 3 Rings
22. Define a new addition O and multiplication O on Z by
a Ob = a + b - 1
and
aOb = a + b – ab,
where the operations on the right-hand side of the equal signs are ordinary
addition, subtraction, and multiplication. Prove that, with the new operations
O and O, Z is an integral domain.
23. Let E be the set of even integers with ordinary addition. Define a new sesat
multiplication on E by the rule “a * b = ab/2" (where the product on the
right is ordinary multiplication). Prove that with these operations E is a
commutative ring with identity.
24. Define a new addition and multiplication on Z by
a O b = a + b – 1
and
a O b = ab - (a + b) + 2.
Prove that with these new operations Z is an integral domain.
25. Define a new addition and multiplication on Q by
rOs=r+s+1
and
rOs = rs + r+s.
Prove that with these new operations Q is a commutative ring with identity. Is
it an integral domain?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F27260fae-539c-4ca6-9fed-6022b8026087%2Fc2ef3b19-70ed-4b8e-8815-3e5f9e80b4bb%2F0eczyr_processed.png&w=3840&q=75)
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