How do I differentiate expressions involving powers of?x?
Powers of?x?are differentiated according to the following formulae:
Differentiating terms with positive integer powers of?x?is straightforward
But negative and fractional powers of?x?can also be differentiated this way
Don't forget these two special cases:
These allow you to differentiate constants and linear terms in?x
If the expression involves a sum or difference of terms just differentiate one term at a time
Exam Tip
Take extra care when differentiating negative and fractional powers of?x?as mishandling negative signs and fractions is a common way to lose marks in these sorts of questions.