Question

let the set A is {1,2,3} and B is {2,3,4} then set A-B is
a){1,-4}
b){1,2,3}
c){1}
d){2,3}​

Answer 1

Answer:

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

Step-by-step explanation:

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

={1}

Hence option c is correct

Answer 2

If $A=\{1,2,3\}$ and $B=\{2,3,4\}$ then $A-B=\{1\}$

Step-by-step explanation:

If we are given two sets A and B then,

A - B means elements of A that are not the elements of B.  

We have,

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

Then,

$A-B=\{x:x\in A, x \notin B\}\\A-B=\{1,2,3\}-\{2,3,4\}\\A-B=\{1\}$

Therefore, option c) is correct.