A coefficient from a minimum
A coefficient from a minimum
4 marks
TGM Original
The quadratic f(x)=3x2+bx+8 has minimum value 5, attained when x=1. Find b, and verify the minimum by completing the square.
Solution:
Solution locked
680+ questions here come with free worked solutions. A free account saves your questions and progress; this one needs tuition enrolment.
Create a free account to practise similar questions.
Answer:\(b=-6\); \(\mathrm{f}(x)=3(x-1)^2+5\).
Need help? Join our JC Math tuition classes.
Learn more