Posted by ladybug on .
For the function f(x)= 8/x+7,find the average rate of change of f from 1 to x.

precalculusPlease help, urgent. 
Reiny,
Did you mean
f(x) = 8/(x+7)
then f(1) = 8/8 = 1
avg rate of change = (f(x)  f(1) )/(x1)
= (8/(x+7)  1)/(x1)
= ( (8  x  7)/(x+7) )/(x1)
= ( (1x)/x+7) )/(x1)
= 1/(x+7) 
precalculusPlease help, urgent. 
ladybug,
thank you so much!!

precalculusPlease help, urgent. 
Reiny,
You are welcome.
(I have just answered 13 questions this morning, and you are the only one to say thank you or acknowledge the answer, much appreciated)