Given that y = x^4 + x^(1/3) + 3, find dy/dx

We use the rule that if y = x^n then dy/dx = n*x^(n-1) which is valid whether or not n is an integer. 

We also use that differentiation is a linear operation, which means that we can differentiate term by term in the expression for y.

Noting that 3 = 3*x^0, we therefore have

dy/dx = 4*x^3 + (1/3)*x^(-2/3) + 0

KS

Related Maths A Level answers

All answers ▸

A quantity N is increasing with respect to time, t. It is increasing in such a way that N = ae^(bt) where a and b are constants. Given when t = 0, N = 20, and t = 8, N = 60, find the value: of a and b, and of dN/dt when t = 12


How do you intergrate ln(x)?


Differentiating equations of the type ln[f(x)]


A ball is thrown from ground level at an angle of 30 degrees from the horizontal with a velocity of 20 m/s. It just clears a wall with a height of 5m, from this calculate the distances that the wall could be from the starting position.