Solve the linear system problem Ax = b.
According to the nature of matrix A, we can have several different method to solve it. Make a simple example, if A is a symmetric matrix, we can gauss seidel method to solve this linear system.
Find the first derivative of f(x) at given x and f(x)
We can use FD6( 6th-order finite difference formulae) algorithm to get the result.
x+2y = 5 and x -y = -1 solve for x+y =?
x=1 y =2 x+y = 3