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# antiderivative of a function such that F(-1)=-1 watch

1. Hi,

I've just started learning this... and I'm rubbish.

find the antiderivative of the function f(x)= x^2 +2x +2 such that F (-1) = -1

and I got...

F(x) = x^3 / 3 +x^2 + 2x + C

And then F(-1) = -1

-1/3 - 2 + c = -1

c= 7/3

so F (x) = x^3/3 + x^2 + 2x +7/3

please help. I tend to make stupid mistakes, and I don't know if I've lost the plot here...
2. (Original post by aliceinwonder123)
And then F(-1) = -1

-1/3 - 2 + c = -1
This part is wrong. You forgot the when subbing in -1
3. (Original post by RDKGames)
This part is wrong. You forgot the when subbing in -1
Thank you, it was a translating error.

is the rest ok?
4. (Original post by aliceinwonder123)
Thank you, it was a translating error.

is the rest ok?
Yes.

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