Which one of the following is a null set?
a) {0}
b){{{ }}}
c{{ }}
d) {xl x² +1=0,x€r
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the set no. d) is a null set
shivam22385:
why please yell me
what??
explanation
ok
after solving the equation we get x=√-1 ,but this is not a natural no. so it is a null set |
thanks
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