logo

Ask Questions, Get Answers

X
 
Home  >>  CBSE XI  >>  Math  >>  Sets

If $A=\{1,2,3,4\},B=\{3,4,5,6\},C=\{5,6,7,8\}$ and $D=\{7,8,9,10\}$ Find (i) $A\cup B$

$\begin{array}{1 1}(A)\;\{1,2,3,4\}\\(B)\;\{1,2,3,4,5,6\}\\(C)\;\{1,2,3,4,5\}\\(D)\;\text{None of these}\end{array} $

1 Answer

$A\cup B=\{1,2,3,4\}\cup \{3,4,5,6\}$
$\Rightarrow \{1,2,3,4,5,6\}$
Common element of the given sets have been taken only once while writing $A\cup B$
Hence (B) is the correct answer.
answered May 26, 2014 by sreemathi.v
 
...