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

In summary, the conversation discusses finding the function f based on the given information of f'(x)=ax+b and f(2)=0. The attempt at solving the problem involves integrating f'(x) treating a and b as constants, which results in f(x)=ax^2/2 + bx. However, the constant of integration is missing and it is mentioned that there may be more than one correct answer due to insufficient information.
  • #1
ggcflo
6
0

Homework Statement



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

Homework Equations


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. that's all i could get... don't know how you could use f(2)=0 in this problem :( help please.
 
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  • #2
ggcflo said:
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
 

1. What is the value of f(x) at x=2?

The value of f(x) at x=2 is 0, as given by the information f(2)=0.

2. What is the slope of the function f(x)?

The slope of the function f(x) is represented by f'(x), where a is the slope of the function.

3. How can I find the value of a and b?

To find the values of a and b, we can use the information given in the equation f'(x)=ax+b. Substituting x=2 and f'(x)=0, we can solve for a and b.

4. Can I use this information to graph the function f(x)?

Yes, with the given information, we can graph the function f(x). The point (2,0) can be plotted on the graph, and the slope of the function can be used to determine the direction of the graph.

5. Is there any other information needed to find the function f(x)?

No, the information f'(x)=ax+b and f(2)=0 is sufficient to find the function f(x). However, if we want to find the specific values of a and b, we would need additional information or equations.

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