Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Promoted
Given f(x)=x^2+x find the values of a for which f''(a)=f(a)?
Can you also show working? Having trouble with this. Thanks
1 Answer
Relevance
- 8 years agoFavorite Answer
I used x instead of a but its he same thing.
f'(x)=2x+1
f"(x)=2
So when does f(x)=f"(x) is the same as when does f(x)=2. When does x^2+x=2.
This becomes a quadratic x^2+x-2=0.
Now just solve the quadratic and you'll have your answer.
Still have questions? Get your answers by asking now.