write the following sets in roaster form?
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Hmm converting to roster form is easy mate
Converting to set builder form is harder
Here just see what are the conditions
Here, 2x+3=11 => 2x=8=> x=4
Only 4 satisfies this given condition
So A1 = {4}
Now, x^2-4x-5= (x+1)(x-5) =0
So only x=-1 and x=5 satisfy these condition
So A2= {-1,5}
Sometimes more then 1 condition is mentioned, then only the terms which satisfy all conditions are included in the set
Converting to set builder form is harder
Here just see what are the conditions
Here, 2x+3=11 => 2x=8=> x=4
Only 4 satisfies this given condition
So A1 = {4}
Now, x^2-4x-5= (x+1)(x-5) =0
So only x=-1 and x=5 satisfy these condition
So A2= {-1,5}
Sometimes more then 1 condition is mentioned, then only the terms which satisfy all conditions are included in the set
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