The Student Room Group
Uni students - Complete our survey >>
Uni students - Complete our survey >>
Uni students - Complete our survey >>

This discussion is now closed.

Check out other Related discussions

e^

if you have e^(x^2+2x) how do you somplify it does it become x^2 +2x?
Ln|e^(x^2+2x)| = (x^2+2x)
logic123
if you have e^(x^2+2x) how do you somplify it does it become x^2 +2x?

Common sense says no. (Why would e^(x^2 + 2x) be equal to x^2 + 2x? What would be the point of the "e^"?)
Reply 3
Avatar for logic123
logic123
OP
sorry no what does e^(x^2+2lnx)
Reply 4
Avatar for Pheylan
Pheylan
generalebriety
Common sense says no. (Why would e^(x^2 + 2x) be equal to x^2 + 2x? What would be the point of the "e^"?)

... or you could just take logs on both sides.
Reply 5
Avatar for logic123
logic123
OP
no what does e^(x^2+2lnx) its this one sos i mistyped
logic123
sorry no what does e^(x^2+2lnx)

Well, e^(a+b) = (e^a)*(e^b). And you should know that 2 ln x = ln(x^2). Can you do it from there?

Pheylan
... or you could just take logs on both sides.

"Both sides" of what? Last time I looked, "do __ to both sides" referred to operating on both sides of an equation to help you solve it. There's no equations here.
logic123
sorry no what does e^(x^2+2lnx)


e^(X^2) * e^ln|X^2|

e^(X^2)X^2
Reply 8
Avatar for logic123
logic123
OP
so it simplifys to x^2 +1 ??
Reply 9
Avatar for logic123
logic123
OP
ok just to check i had to intergrate 2x/1+x^2 does that give you x^2+2lnx
Reply 10
Avatar for rbnphlp
rbnphlp
11
logic123
so it simplifys to x^2 +1 ??

no..ex2.x2e^{x^2}.x^2
Reply 11
Avatar for Tewari
Tewari
no.. it wont. if you take the ln of the function then it would be x^4.. correct me if im wrong guys.. brain seems dead.
Reply 12
Avatar for rbnphlp
rbnphlp
11
logic123
ok just to check i had to intergrate 2x/1+x^2 does that give you x^2+2lnx

no

make the substitutionu=x2+1 u=x^2+1
logic123
ok just to check i had to intergrate 2x/1+x^2 does that give you x^2+2lnx


Always keep an eye out for integrals of this type:

∫f′(x)f(x)=ln∣f(x)∣+k\int \frac{f'(x)}{f(x)} = ln |f(x)| + k
Reply 14
Avatar for Tewari
Tewari
why are we integrating though?
Tewari
why are we integrating though?

Because the OP keeps changing the question, and his latest one seems to involve integration.
logic123
if you have e^(x^2+2x) how do you somplify it does it become x^2 +2x?



The question is nonsense.

I have a similar nonsense question.

If you have 12 how do you simplify it to become 5?
Reply 17
Avatar for Tewari
Tewari
haha, this is getting insane...

how about subtract 7 from the 12 to get 5?? ^.^
Tewari
haha, this is getting insane...

how about subtract 7 from the 12 to get 5?? ^.^


Simplify does not mean change the value. That's why my question and the OP's question are nonsense.
take the natural log of it, log base e and that should put it to the function you want. Which is what you wanted.

Related discussions

Latest

Trending

Trending

Articles for you