• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Find f from this information f'(x)=ax+b, f(2)=0

  • Thread starter ggcflo
  • Start date
1. The problem statement, all variables and given/known data

find f from this information f'(x)=ax+b, f(2)=0

2. Relevant equations



3. The attempt at a solution

if you integrate f'(x) treating a and b as constants you get f(x)= ax^2/2 + bx
and if you substitute f(2) you get 2a+2b. thats all i could get... dont know how you could use f(2)=0 in this problem :( help please.
 

Office_Shredder

Staff Emeritus
Science Advisor
Gold Member
3,734
98
if you integrate f'(x) treating a and b as constants you get f(x)= ax^2/2 + bx
You forgot the constant of integration

If this is the whole problem, they don't give you enough information to fully solve for a single f(x) so there will be more than one right answer
 

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top