If $$\int_{1}^{8}f(x)dx=9.6$$ and $$\int_{5}^{8}f(x)dx=2.5$$ then find $$\int_{1}^{5}f(x)dx$$

Question

irishboy123 · Answer

just add them up ..... make sense??  this is about the linearity of integration.

kittiwitti1 · Answer

i hate that the latex resets when people comment...

what do you mean add up? o_o

irishboy123 · Answer

are you online right now?

irishboy123 · Answer

cos @sshayer is just gonna type out the answer !!!!!

sshayer · Answer

$$\int\limits_{a}^{b}f(x)dx=\int\limits_{a}^{c}f(x)dx+\int\limits_{c}^{b}f(x)dx$$

sshayer · Answer

whenever he is on line ,he will read the formula

irishboy123 · Answer

@sshayer 

this site is apparently dying but your stuff is brilliant!  good health, mate !!

sshayer · Answer

thank you.

irishboy123 · Answer

mp, mate :-)

kittiwitti1 · Answer

I lagged out... sorry...


and uh... I'm female @sshayer o_O

kittiwitti1 · Answer

ok... should I add this by $\Sigma$ summation or something?

irishboy123 · Answer

no!

this:


$$\int\limits_{a}^{b}f(x)dx=\int\limits_{a}^{c}f(x)dx+\int\limits_{c}^{b}f(x)dx$$

kittiwitti1 · Answer

I don't get how to add that

kittiwitti1 · Answer

should I convert to summation or ?

irishboy123 · Answer

@kittiwitti1 

$9.6 - 2.5 = ?$

kittiwitti1 · Answer

how did you come about those numbers?  o_o

kittiwitti1 · Answer

7.1

irishboy123 · Answer

your orig post:

$$\int_{1}^{8}f(x)dx=9.6$$ and $$\int_{5}^{8}f(x)dx=2.5$$ then find $$\int_{1}^{5}f(x)dx$$

kittiwitti1 · Answer

ahh... I see
sorry, LaTeX glitched back to code once a comment appeared

irishboy123 · Answer

but @sshayer is spesh !!

kittiwitti1 · Answer

is there a way to add it when no values for the integral are given?

maybe but he thought I was male... lol :p

irishboy123 · Answer

fo !!


you're now having a laugh

irishboy123 · Answer

:-))

kittiwitti1 · Answer

er... got confused. what do you mean? :(

irishboy123 · Answer

nothing

are we moving ahead?

sshayer · Answer

$$\int\limits_{1}^{8}f(x)dx=\int\limits_{1}^{5}f(x)dx+\int\limits_{5}^{8}f(x)dx$$

sshayer · Answer

sorry,kittywitti1 i thought you are male.

kittiwitti1 · Answer

ah... it is ok I guess. was just a mistake @sshayer I forgive lol

irishboy123 · Answer

wtf?!?!

kittiwitti1 · Answer

what?

kittiwitti1 · Answer

something I missed?

irishboy123 · Answer

nah, my bad

kittiwitti1 · Answer

ok. lol
I will close this question now... 


can I have a medal though? :(

irishboy123 · Answer

i gave your medal to ssh

he declined but i insisted!!

seriously :)

kittiwitti1 · Answer

uh... ok? :(