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Mathematics 8 Online
OpenStudy (anonymous):

PLEASE HELP WITH MATH QUESTION BELOW WILL FAN AND MEDAL

OpenStudy (anonymous):

Find A intersection B. A: {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12} B: {-2, -1, 1, 4, 7, 11}

OpenStudy (anonymous):

AND THIS IS BETWEEN A AND B

OpenStudy (anonymous):

@jprose @JFraser @horsegirl27

OpenStudy (anonymous):

@Michele_Laino

OpenStudy (anonymous):

A. {-2, -1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} B. {1, 4, 7, 11} C. {-2, -1, 1, 2, 3, 4, 5, 6} D. { }

OpenStudy (michele_laino):

the intersection is the set of all elements which belong to both sets, namely is the set of all elements in common to both sets, to which the intersection refers

OpenStudy (anonymous):

SO COMBINE THEM ALL FROM LEAST TO GGREATEST?

OpenStudy (michele_laino):

for example, number 1 belongs to the set A, and it belongs to the set B too, so the requested intersection must contain the number 1

OpenStudy (anonymous):

ohhh ok thx so just what shows in both of them?

OpenStudy (michele_laino):

yes!

OpenStudy (anonymous):

b?

OpenStudy (michele_laino):

you have to pick common elements only That's right!

OpenStudy (michele_laino):

your answer is right!

OpenStudy (anonymous):

thank you one more please

OpenStudy (michele_laino):

ok!

OpenStudy (anonymous):

Find B union D. B: {-2, -1, 1, 4, 7, 12} D: {numbers divisible by 3 from 1 to 15} A. {12} B. {-2, -1, 1, 3, 4, 7, 12} C. {-2, -1, 1, 3, 4, 6, 7, 9, 12, 15} D. { }

OpenStudy (anonymous):

WHAT IS A UNION

OpenStudy (michele_laino):

here the set D is the subsequent set: D={3,6,9,12,15} is it ok?

OpenStudy (anonymous):

ok so what is a union

OpenStudy (michele_laino):

the union is the set of all elements which belong to A or which belong to D

OpenStudy (anonymous):

only one of them or both, like the other other question?

OpenStudy (michele_laino):

for example, if I have the subsequent 2 sets: A={1,5,7,9,11} D={2,4,6,8} then their union is: A union D = {1,2,4,5,6,7,8,9,11}

OpenStudy (anonymous):

ohh so all of them even if they dont show in both subsequent sets

OpenStudy (michele_laino):

yes!

OpenStudy (anonymous):

its c !.... right?

OpenStudy (michele_laino):

that's right!

OpenStudy (anonymous):

thx lots

OpenStudy (anonymous):

that is all

OpenStudy (michele_laino):

thanks! :)

OpenStudy (anonymous):

for?

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