maths person needed (nerdy maths thread)

maths person needed (nerdy maths thread)

in the following:

Y is supposed to be lambda, e is exponential

Yu = 10 e(-0.02 x 50)
Yu = 10 e-1
Yu = 10 x 0.368
Yu = 3.68

where does the 0.368 come from?

I've tried 10 'exp' -1 on my calculator, and that just gives me 1...

confused a bit :spangled:

All I know is that pi = 3.68

I don't have a clue

pi = 3.142 mate

oh well close

just looking at that makes my entire head hurt

What u cannot work that out?!!!

I have just been informed that i was using exponential where i actually should have been using natural exponent....

so much clearer now

you want to know whats even worse?

this is for a software engineering exam

shite topic

you would have thought my maths, physics and chemistry a-levels might have helped here.

But it didn't

Re: maths person needed (nerdy maths thread)

Whats the equation supposed to be? I've no idea how they get Yu = 10e-1 = 10 x 0.368 because it doesn't as you say.

Should've read this first

oh well of course! i cannot believe i didnt spot that myself!!!

10e-1 = 3.68

copy and paste?



e = 2.73 (always..thats the natural exponent, much in the same way that pi = 3.142....always)

THUS:

10e(-1) = 10 x (1/2.73)

e(-1) = 1/2.73
= 0.366

10 x 0.366 = 3.66

ET VOILA.

Just did it in my calc m8..

Then to add the prior step in simply devide by 10.

Voila

aye - apparently the "exp" can be different depending on the calculator manufacturer

At least that way is guaranteed to be right, even if it does take a few more steps

as if my heads not battered enough from last night!

my apologies, i would have thought that "maths person needed (nerdy maths thread)" would be enough of a deterrant for anybody who really couldnt care less/doesn't want a head blagging

good will chandler owa there