Trên tập hợp A={-2,-1,1,2,3,4,5} ta xét quan hệ hai ngôi R như sau: xRy <=> x+ 3y chẵn
a: chứng minh R là quan hệ tương đương
b:tìm các lớp tương đương [1], [2], [4]

for the first question it would be the second answer for the second question it would be the third answer and for the third question it would be the first answer

step-by-step explanation:

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.

answer: your answer is a