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lakkis [162]
3 years ago
12

Find A={a,b,c} then find A*A.​

Mathematics
2 answers:
Alenkasestr [34]3 years ago
7 0

Assuming you want to do a cartesian product, then you basically form items (x,y)  such that x is in set A, and y is in set A

More generally, A * B will consist of items of the form (x,y) such that x is in A and y is in B. However, we have B = A.

So,

A * A = {

(a,a), (a,b), (a,c)

(b,a), (b,b), (b,c)

(c,a), (c,b), (c,c)

}

I broke things up into separate rows to show that we can form a 3x3 table. Each row is a different x value from the set {a,b,c}. Each column is a different y value from the set {a,b,c}

In my opinion, this helps organize things much better than rather have it all on one single line like this

A * A = { (a,a), (a,b), (a,c), (b,a), (b,b), (b,c), (c,a), (c,b), (c,c) }

which in all honesty looks like a bit of a cluttered mess.

Mice21 [21]3 years ago
6 0

Answer:

Step-by-step explanation:

A={a,b,c}

A×A={a×a,a×b,a×c,b×a,b×b,b×c,c×a,c×b,c×c}

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In triangle △ABC, ∠ABC=90°, BH is an altitude. Find the missing lengths. AC=5 and BH=2, find AH and CH.
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Step-by-step explanation:

An altitude divides a right triangle into similar triangles. That means the sides are in proportion, so ...

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The problem statement tells us AH + CH = AC = 5, so we can write

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3 years ago
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Answer:

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4 y + 10 x + 3 = -2 y - 17 x + 9 | (BC=EF)

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