Applications of derivatives

9000064104

Level: 
B
Let \(p\) be the tangent to the graph of the function \(f(x) = x^{2} - x - 6\) parallel to the line \(y = 3x + 1\). Find the point \(A\) where \(p\) touches the graph of \(f\).
\(A = \left [2;-4\right ]\)
\(A = \left [2;4\right ]\)
\(A = \left [1;6\right ]\)
\(A = \left [-1;-4\right ]\)

9000064106

Level: 
B
Let \(p\) be the tangent to the graph of the function \(f(x) = x^{2} + 4x - 2\) perpendicular to the line \(x + 6y + 2 = 0\). Find the point \(A\) where \(p\) touches the graph of the function \(f\).
\(A = \left [1;3\right ]\)
\(A = \left [-5;3\right ]\)
\(A = \left [-3;-5\right ]\)
\(A = \left [0;-2\right ]\)

9000064110

Level: 
B
Identify a true statement related to the function \(f(x) = \frac{x-1} {x+1}\).
The tangent at \(T = [-3;2]\) is parallel to \(x - 2y + 1 = 0\).
The tangent at \(T = [-3;2]\) contains the point \(A = \left [1;-4\right ]\).
The slope of the tangent at \(T = [-3;2]\) is \(2\).
The tangent at \(T = [-3;2]\) is perpendicular to \(x + 2y + 1 = 0\).

1003263403

Level: 
C
Find the global extrema of the following function on the interval \( [0;3] \). \[ f(x)=2x^3-3x^2-12x \]
the global minimum at \( x=2 \), the global maximum at \( x=0 \)
the global minimum at \( x=2 \), the global maximum at \( x=-1 \)
the global minimum at \( x=0 \), the global maximum at \( x=2 \)
the global minimum at \( x=3 \), the global maximum at \( x=0 \)