Tham KY's answer to Jeanette Tan's Junior College 2 H1 Maths question.
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
...
Date Posted:
7 years ago
take the second derivative of the function to justify the value is maximum. (the slope will be negative if the function is maximum)
360 Tutoring Program