Question

cual es el dominio de R

Answer 1

A={x/x es par ;1<x ≤9}

={2,4,6,8}

B={x/x Є N;5 < x <10}

={6,7,8,9}

R={(x;y) Є AxB/x+1<y}

AxB={(2,6)(2,7)(2,8)(2,9),(4,6)(4,7)(4,8)(4,9),(6,6)(6,7)(6,8)(6,9),(8,2)(8,4)(8,6)(8,8)}

R={6,8}

Rpta: B)