Find the value of x, where x is an integer, corresponding to the point on the graph of f located at a height of 1 unit from the x-axis.
Please see the attached file for detailed solution.
First draw a horizontal line at y = 1 (red). All points on this line are 1 unit from x-axis.
Secondly, find the intersection points of the ...
The solution explains how to find corresponding values of x when the function f(x) is equal to 1 or -1.