Assuming you have secured a legitimate copy, here is a 6-week study plan to master the content:
: Covers techniques for estimating values between known data points, such as Lagrange Polynomials Cubic Spline Interpolation Numerical Integration and Differentiation Free Pdf On Numerical Analysis By Dutta Jana
If you cannot find the Dutta & Jana PDF, these books cover the same curriculum and are widely available: Introductory Methods of Numerical Analysis Assuming you have secured a legitimate copy, here
Methods like Bisection, Regula-Falsi, and Newton-Raphson are explained with worked examples. Free Pdf On Numerical Analysis By Dutta Jana