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hdj725
Aug 22, 2008, 05:25 AM
if f(x)= X(squared)+2x+5

Then f(x+h) = ?

galactus
Aug 22, 2008, 05:34 AM
Just plug x+h in for x in your function and simplify.

(x+h)^{2}+2(x+h)+5

galactus
Aug 22, 2008, 05:46 AM
Do you have to go further and find the derivative via the definition?

That is, \lim_{h\to 0}\frac{f(x+h)-f(x)}{h}

hdj725
Aug 24, 2008, 03:00 PM
Thanks!