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C3 function question

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Why bother with a post grad course - waste of time? 17-10-2016
1. My question

My answer to part a

But for the part about f(x) = k
My working was:

Please can you tell me if my method is right way to show that f(x) = k

b)

Please show me a better way, I try to use my result to show that f(x) =k/x but i dont think i am right. Also how to i show that f(x) = kx

c)i did part c

thank you
2. (Original post by bigmansouf)
My question

My answer to part a

But for the part about f(x) = k
My working was:

Please can you tell me if my method is right way to show that f(x) = k

b)

Please show me a better way, I try to use my result to show that f(x) =k/x but i dont think i am right. Also how to i show that f(x) = kx

c)i did part c

thank you
For the first part you have . You know that . Using this you should be able to take out a factor on top and bottom containing an expression in x.
3. (Original post by B_9710)
For the first part you have . You know that . Using this you should be able to take out a factor on top and bottom containing an expression in x.
for part a (ii) f(x0 = k I did what you recommended whereby I found b/d. the Problem is that b/d is not a constant to my understanding sine b/d can be any number doesn't that make it a variable
4. (Original post by bigmansouf)
for part a (ii) f(x0 = k I did what you recommended whereby I found b/d. the Problem is that b/d is not a constant to my understanding sine b/d can be any number doesn't that make it a variable
Everything is constant except the variable .
5. (Original post by B_9710)
Everything is constant except the variable .
Thank you

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