Question

let a=(1,2,3) b=(2,3,4) then n(a×b) intersection (b×a)
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Answer 1

Answer:

option: (c) 4

Step-by-step explanation:

A = {1,2,3} , B = {2,3,4}

Now,

AxB = {1,2,3} x {2,3,4}

= {(1,2),(1,3),(1,4),(2,2),(2,3),(2,4),(3,2),(3,3),(3,4)}

and

BxA = {2,3,4} x {1,2,3}

= {(2,1),(2,2),(2,3),(3,1),(3,2),(3,3),(4,1),(4,2),(4,3)}

A/Q,

(AxB)&(BxA) = {(2,2),(2,3),(3,2),(3,3)}

so,

n(AxB)&(BxA) = 4.