Question 55710
find the average rate of change of f from 1 to x.
[f(x) - f(1)] / x-1 
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The average rate of change from 1 to x is [f(1)-f(x)]/[1-x]
f(1)=[f(1)-f(1)]//(1-1) which is undefined.
So you cannot figure out the average rate of change.
Cheers,
Stan H.