Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.



Question

secondary 4 | E Maths
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
May Chua
May Chua

secondary 4 chevron_right E Maths chevron_right Singapore

Pls help on ii
2018 cwealth paper 2 thanks

Date Posted: 5 years ago
Views: 247

See 1 Answer

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Ng Ming Bing
Ng Ming Bing's answer
53 answers (A Helpful Person)
1st
f'(x) is equation of 1st derivative, ie the equation of the gradient of f(x). If f'(x)=0, it means gradient of f(x) =0 which also means the root of the equation of f'(x)
Recall discriminant b^2-4ac >0 means 2 real and distinct roots
also recall sum and product of roots for part ii and iii