Simple integration question. (1 Viewer)

[BobMac]

Hey everyone
I was doing a past paper and I stumbled upon a question which I found to be easy but I got wrong.

Use the substituion u=sq.root (x) to integrate
e^sq.root (x) / sq root (x)
The limits are 9 at the top and 1 at the bottom

The answer I got was 2(e^3 - e) and the given was (1/2)(e^3 - e).

Am I right or are the answers wrong cause the answers have had some mistakes.

Thanks

 

[slyhunter]

Wolfram says you're right.

 

[BobMac]

Wolfram says you're right.

Thought so.
Thanks man

 

[SpiralFlex]

Let

 

[slyhunter]

You guys didn't factor the e out lol.

 

[thoth1]

yeah ur right. but heres a faster way in the future:



noting that the derivative of root x = 1/2root x.

 

[SpiralFlex]

You guys didn't factor the e out lol.

What are you talking about....?

 

[BobMac]

yeah ur right. but heres a faster way in the future:



noting that the derivative of root x = 1/2root x.

I know but the question said to use the substitution.

 

[thoth1]

I know but the question said to use the substitution.

ah ok. srry bout that.

 

[slyhunter]

 

[BobMac]

ah ok. srry bout that.

No worries

 

[SpiralFlex]

Does anyone know why my Latex equation came out like that?

 

[thoth1]

Does anyone know why my Latex equation came out like that?

do u use the equation editor? or do u write ur own?

 

[SpiralFlex]

do u use the equation editor? or do u write ur own?

I initially wrote my own since I was Latex fluent. Then I used the editor. Same result.

 

[thoth1]

worked out fine for me

 

[SpiralFlex]

Does not work for me?

Edit: Fixed!