6. intersection points with axis

In order to find the intersection point with the axis, we have to solve the systems:

Example:  f(x) = x² + x -2, cuts the axis at points (-2,0), (1,0) and (0,-2)

 

 

Exercise: find the intersection points with axis of these functions:

a)  

b) f(x) = e^x+7

c) f(x)= sin 3x

 

 

Solutions: a) Φ; b) (0,e⁷); c) x € {k·60º; k € Z}