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