

2 Confusing Functions Q
#1
Posted 10 October 2005 - 05:52 PM
When g(x) is divided by x-3, the remainder is 36. Find a, and hence solve
g(-2x)=-18.
2- f(x)=x(squared)-1 and g(x)=2x+7
The function h is such that whenever
f(a)=b, and g(b)=c, then h(a)=c.
(a) If b=8, find values for a & c.
(b) Find a formula for h-1 (x), the inverse of h(x) in terms of x.
#2
Posted 11 October 2005 - 03:13 PM

#3
Posted 12 October 2005 - 02:52 PM

Everyone on their October holiday??
Just spotted your question but am just running out of the door. Will past worked solutions later if no one else gets back to you first.
H tends 2 infinity
---------------------------------
Never argue with an idiot. They drag you down to their level then beat you with experience.
#4
Posted 12 October 2005 - 02:57 PM
use the remainder thereum you know the one where you have a remainder at the end
well this remainder will be made to = 36
then its a simple solving one
next question
to find c use g(b) = c as we know the value of b
f(a) = b which means f(a) = 8
x2 - 1 = 8
solve it
inverse is the same as changing the subject of the formula from h(x) = something, to x = something
If i am not here i am somewhere else
#5
Posted 12 October 2005 - 04:40 PM
#6
Posted 12 October 2005 - 04:47 PM
g(-2x)= -18, so now what do I do?
#7
Posted 12 October 2005 - 04:53 PM
you solve the equation
g(-2x) = -18
8x2 + 9 = -18
etc etc
If i am not here i am somewhere else
#8
Posted 12 October 2005 - 04:59 PM

#9
Posted 12 October 2005 - 05:14 PM
#10
Posted 12 October 2005 - 05:59 PM
While you read that Rocky, I'll have a go at question 2.
H tends 2 infinity
---------------------------------
Never argue with an idiot. They drag you down to their level then beat you with experience.
#11
Posted 12 October 2005 - 06:16 PM
#12
Posted 12 October 2005 - 06:30 PM
Hope this helps.
Where did you get these questions btw?
H tends 2 infinity
---------------------------------
Never argue with an idiot. They drag you down to their level then beat you with experience.
#13
Posted 12 October 2005 - 07:31 PM
#14
Posted 12 October 2005 - 07:38 PM
If you had said that at the beginning I wouldn't have given you full solutions!!

I hope I get them right then!

H tends 2 infinity
---------------------------------
Never argue with an idiot. They drag you down to their level then beat you with experience.
#15
Posted 12 October 2005 - 09:51 PM
We're here to help you with specific problems you're having, not to do your homework for you.


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#16
Posted 12 October 2005 - 10:11 PM
If i am not here i am somewhere else
#17
Posted 13 October 2005 - 03:34 PM
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