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Sunday, November 9, 2008

More Math Fun With the Benchmeister

***HINT: HOW MANY WAYS CAN YOU WRITE XX ***

Okay since we are on the derivative laws and rules part of our lives, I decided give you all a little problem to solve. Here it is:

Okay given (plus we know) that:

d
---- nx = nxn - 1
dx


d
---- ax = ax * ln a
dx


d
---- (u*v) = u * v' + v * u'
dx


d
---- ln u = u-1 * u'
dx


What is:

d
---- xx
dx

2 comments:

dkuropatwa said...

Very cool question! Did you make it up or did you see it somewhere? (It's a popular conundrum.)

SPOILER











DON'T READ THIS











I'm WARNING YOU WIZOWSKI!











OK, I WON'T RUIN IT











JUST A HINT











Requires starting by taking the natural log of both sides. ;-)

Benofschool said...

I saw it somewhere.
I tried myself but I didnt get it at first. Now I know what it is, so I wishing to pass it on to my other classmates

=D