Roots by a change of sign
If f(a) and f(b) have different signs, a continuous graph must cross the axis between them. Narrow the interval to find a root.
You will be able to
- Show a root lies between two values
- Narrow the interval with decimal search
- Give a root to 1 decimal place
- Know when a sign change can mislead
25 minutes, 7 exam-style questions, with the Graphing Calculator.