# Quadratic Approximation in Calculus: How to Use it, Step by Step

Calculus > Quadratic Approximation Quadratic polynomial approximations are specific examples of a useful class of quadratic approximations known as Taylor polynomials. The basic idea is that you want to approximate a function with a line. However, a straight line normally…

# How to use Taylor Polynomials to Approximate a Function

Calculus > Taylor polynomials can be used to approximate a function around any value for a differentiable function. Taylor polynomials look a little ugly, but if you break them down into small steps, it’s actually a fast way to approximate…

# Second Derivative Test: Definition, Finding Extrema

Calculus > Second Derivative Test The second derivative test is used in calculus to find intervals where a function has a relative maxima and minima. You can also use the second derivative test to determine concavity. The second derivative test…

# How to Find a Second Derivative

Calculus > The second derivative, f”, is the derivative of the derivative f’. In other words, in order to find a second derivative, take the derivative of the derivative. The second derivative is especially useful when it comes to classifying…