Difference Quotient

Questions
1

Hello All,

I am posting because I am having a hard time solving for the difference quotient for example I have the following question…

f(t)=?t; t=a,t=a+h
Solve using the difference quotient

I am not sure how to go about solving it, can someone please explain each step.

Thanks

2

This is a basic introductory calculus question. Mr Khan can help:

https://www.khanacademy.org/math/differential-calculus/taking-derivatives/power_rule_tutorial/v/proof-d-dx-sqrt-x