Please verify your account before proceeding.
In this lesson, we will learn how to solve a cubic equation graphically.
Q1:
Use technology to plot the graph of 𝑓(𝑥)=𝑥+5𝑥−100, and use this graph to find the solutions to the equation 𝑥+5𝑥=100 to two decimal places.
Q2:
Use technology to plot the graph of 𝑓(𝑥)=𝑥+3𝑥−2, and use this graph to find the solutions to the equation 𝑥+3𝑥=2 to two decimal places.
Q3:
The graphs intersect at three points, one of which has 𝑥-coordinate 1. Find a quadratic equation whose roots are the 𝑥-coordinates of the other two points of intersection.
By considering the discriminant of this quadratic equation, find the slope of the line through (1,0) which is tangent to the curve at some other point.
At what point is this line tangent to the curve?
Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.