Exercise

Solve the following system of inequalities:

y - 1 > (x - 2)2
y < x + 1

Solution

To solve a system of inequalities, we need to solve each individual inequality first. Then, find the overlapped area. Because this overlapped region can satisfy both inequalities at the same time, this area is the solution to the system.

First, draw the curve y - 1 = (x - 2)2, as shown below.

Image As shown, the shaded area is the solution to the inequality y - 1 > (x - 2)2.

Similarly, we can find the solution to y < x + 1, as shown below.

Image

When we put both solution graphs on one chart, we can find the overlapped area, that is, the area that satisfies both inequalities. This overlapped area is the solution to the system, as shown below.

Image



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