Here is the answer to the given description above. The UNION OF SETS is the set <span>made taking all the elements from two or both sets, not repeating any elements. Hope this is the answer that you are looking for. Have a great day ahead!</span>
A ) The domain: x ≤ -4 and x≥ 4 or: x ∈ ( - ∞ , - 4 ) ∪ ( 4 , + ∞ ) b ) f ` ( x ) = c ) The slope of the line normal to the graph at x = 5 m = -1 / f `(x) f ` ( x ) = m = - 3/34