What is the product rule and when do you use it?
The product rule is used when finding the derivative of the product of two functions - two functions multipled together.
If y = f(x)g(x), then
dy/dx = f'(x)g(x) + f(x)g'(x)
Where f'(x) is the derivative of f(x) and g'(x) is the derivative of g(x).
TJ
Related Maths A Level answers
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I don't understand chain rule for differentiation especially when combined with more complex functions.
Integrate 1 / x(2sqrt(x)-1) on [1,9] using x = u^2 (u > 0).