Need help with this function question

  • Thread starter psp101
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  • #1
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Homework Statement



evaluate f(x+h) expand and simplfy f(x)=x^3-7x^2+x+1?


Homework Equations


f(x+h)


The Attempt at a Solution


my attempt (f(x+h)+f(x)+1
x^2(x+h)+x+1
x^2(x+7)+x1
im lost I'm not sure how to do this
 

Answers and Replies

  • #2
LCKurtz
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Replace the x's with x+h and simplify.
 
  • #3
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Replace the x's with x+h and simplify.

o really so is it like

f(x)=(x+h)^3-7(x+h)^2+(x+h)+1
then I simplify
 
  • #4
LCKurtz
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o really so is it like

f(x)=(x+h)^3-7(x+h)^2+(x+h)+1
then I simplify

Yes.


yeah but the original equation is usually set up at(when u are evaluating the limit) (x+h)-f(x), so you have to minus the original function from the (x+h)^3-7(x+h)^2+(x+h)+1, you will just end up with the first derivative.

No you won't. There is more to it than that, and that's not what psp101 asked anyway.
 

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