Question

Because int(1/x^2, x = -2 .. -1) the result is 1/2?

Answer 1

\[\int_{-2}^{-1}\frac{dx}{x^2}\]??

Answer 2

yeah, what i wrote

Answer 3

anti derivative is \(-\frac{1}{x}\)

Answer 4

plug in \(-2\) then plug in \(-1\) and subtract

Answer 5

I did not

Answer 6

?

Answer 7

\[-\frac{1}{x}\bigg|_{-2}^{-1}\] is the usual notation but it means
\[
f(-2)-F(-1)\]

Answer 8

you get
\[-\frac{1}{-2}-(-\frac{1}{-1})\] sort out the minus signs and you will get it

Answer 9

oops wrong, i had that backwards!

Answer 10

\[-\frac{1}{-1}-(-\frac{1}{-2})\]

Answer 11

so yeah, \(1-\frac{1}{2}=\frac{1}{2}\) is the answer

Answer 12

Now I could understand my friend, thank you ... you use facebook?

Answer 13

oh no

Answer 14

whatsapp, skype?