Level 3 Differentiation Walkthrough
2019 NCEA Level 3 Differentiation Question 3(b)
2019 Paper
Walkthrough overview
What this question practises
This 2019 walkthrough is part of AS91578 — Apply differentiation methods in solving problems.
Method: Reading derivative conditions and limits from a graph.
This is Question 3(b) from the 2019 NCEA Level 3 Differentiation paper for AS91578 — Apply differentiation methods in solving problems. Use the guided hints to practise the method before revealing the full working.
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Learning summary
Review the method, not only the answer
This walkthrough helps you practise reading derivative conditions and limits from a graph. Use the hints to plan the method, then repeat the question without hints and check each step.
Common mistake to avoid
Check each step against the original condition, preserve signs and restrictions, and confirm that the final result answers the question asked.