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#1 2006-03-01 16:10:39

kynetikg01
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derivatives

hello everyone. i was doin some calculus and got stuck on this problem
f(x)= 10 - x

find the : f^(-1)(x)= ?

written as f'(x) just replace the ' w/ the -1

what does that mean? is that the inverse or somethIN?
i've been dealing w/ derivatives
-thanks

Last edited by kynetikg01 (2006-03-01 16:12:13)

#2 2006-03-01 16:56:56

naturewild
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Re: derivatives

I'm positive that it's asking for an inverse. But I dont know why you are dealing with inverse when you have learnt derivatives.

#3 2006-03-01 17:06:14

krassi_holmz
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Re: derivatives

Ya it's inverse function.
Write it like this:
y=10-x
-x=y-10
x=10-y
This is the inverse function:
f^(-1)(y)=10-y
[corrected]

Last edited by krassi_holmz (2006-03-02 03:30:18)

IPBLE:  Increasing Performance By Lowering Expectations.

#4 2006-03-02 03:15:17

mathsyperson
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Re: derivatives

I think there's a mistake in there.

y = 10-x
x+y = 10
x = 10-y

Therefore, f-1(x) = 10-x.

Why did the vector cross the road?
It wanted to be normal.

#5 2006-03-02 03:28:58

krassi_holmz
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Re: derivatives

Mathsy's right.

IPBLE:  Increasing Performance By Lowering Expectations.

#6 2006-03-02 03:30:37

krassi_holmz
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Re: derivatives

[corrected]

IPBLE:  Increasing Performance By Lowering Expectations.