magardibosh107 magardibosh107

03-11-2020
Mathematics

contestada

Let a * b = 3a + 2b for a, b e Z. Verify that * is a
commutative binary operation on Z.
[2]

Respuesta :

LammettHash LammettHash

04-11-2020

It's not commutative:

a * b = 3a + 2b

but

b * a = 3b + 2a

We have equality only for

3a + 2b = 3b + 2a → a = b

Answer Link

Otras preguntas

the rule that applies to the following number sentence 0÷7=0

What effect do you think the Pyrenees, Alps, & Carpathian Mountains had on life in medieval Europe?

Thomas' grandfather is 100. Thomas' grandfather is 10 times older then Thomas.How old is Thomas?

List two non-SI units for volume, and explain how they relate to the cubic centimeter.

Which of the following best describes the difference between the way that early historians and modern historians have studied the past? a. Early historians con

Can we see or feel energy?

which is another way to write 3 tens 9 ones

You are to give ampicillin 35 mg/kg to a child with a mass of 26 kg. If stock on hand is 250 mg/capsule, how many capsules should be given?

1.49 convert decimal to a fraction

what is the purpose for an organizational structure in health care facility