All Tasks
Tangent and normal lines
Consider the function $f$, with domain $D_f = \left[0, 1\right]$, defined by $f(x)= \dfrac{\pi}{2} -2 \arcsin(1-2x)$.
Let $r$ be the line tangent to the graph of the function $f$ at the point with abscissa $a$.
It is known that line $r$ is perpendicular to line $x+4y=12$.
# Functions of one variable
Training
13
Missing coordinate
Give the missing coordinate p of the point P(2.2;p) in that way, that P is element of the graph of the linear function f with f: y = 4.4 - 0.5 x
# Linear functions
Training
7
Escalator
The ride on an escalator can be described by the function f with f: y = -0.4 x + 6.6. Thereby x is in this equation the time for the ride in seconds, y the height in meter.
A person takes the escalator to the next floor. The next floor is 3.5 m heigt. Estimate the time for the ride.
# Linear functions
Modeling
5
Solving linear equation 1
Solve the linear equation by equivalent transformation.
7x + 22 = 71
# Linear equations
Training
7
Tangent and normal line of arccos
Let $f$ and $g$ be two differentiable functions in their domain, such that:
$g(x)=-3\pi +2 \arccos(3f(x)+1)$,
$f(1)=-\dfrac{1}{3}$ and $f^{\prime}(1)=\dfrac{2}{3}$.
The reduced equation of the tangent line to the graph of $g$ at the point with abscissa $1$ is:
# Complements of differential calculus in real numbers
Training
13
Arctan normal line
At the point of intersection with the ordinate axis, an equation of the straight line normal to the graph of the function $g(x)=2\arctan(x-1)$ is
# Functions of one variable
Training
12
