Question

if a ={11, 12, 13 ,14, 15 ,16} and b ={ 11, 12, 15 ,16, 17 ,18 ,19 }then find the value of (a-b)and(b-a).
please give correct answer fast.​

Answer 1

Answer: A-B={13,14}

              B-A={17,18,19}

Given:

$\sf A=\{11,12,13,14,15,16\}$

$\sf B=\{11,12,15,16,17,18,19\}$

To find:

$\sf Value\:of\:(A-B)\:and\:(B-A).$

Explanation:

1. A-B:

$\sf A-B=\{11,12,13,14,15,16\}-\sf\{11,12,15,16,17,18,19\}$

         $\sf =\{13,14\} \quad --(Cancelling\:out\:the\:common\:and\:writing\:the\:elements\:of\:A)$

2. B-A:

$\sf B-A=\{11,12,13,14,15,16\}-\sf\{11,12,15,16,17,18,19\}$

         $\sf =\{17,18,19\}\quad --(Cancelling\:out\:the\:common\:and\:writing\:the\:elements\:of\:B)$

Hence, the answer is:

A-B={13,14}

B-A={17,18,19}