(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the equation f(x) who's integral is [tex]\int x^{3}[/tex] and has a tangent x+y=0

2. Relevant equations

3. The attempt at a solution

I know that f(x) is 1/4x^{4}+c because of the integral. The tangent is the derivative of f(x) at some point

i have the equations

y=x^{3}+c

y=-x

but solving these equations gives me two unknowns...

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# Homework Help: Function and its tangent

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