Newton interpolary difference formula

[fonseh]

Homework Statement

I don't understand the meaning of the formula... For the circled part in the first photo , what is the meaning of f(x1 ,x2 ) ? and also f(x0 , x1 ) ?

Homework Equations

The Attempt at a Solution

I used the highlighted formula to find the second divided difference . But , Here's what i gt :

f(x1 ,x2 ) - f(x0 , x1 ) / ( x2 -x0 )
=
(0.510*0.381)-(0.521*0.510) / (2.6-2.1) , I ended up getting -0.143

 

[Ray Vickson]

Homework Statement

I don't understand the meaning of the formula... For the circled part in the first photo , what is the meaning of f(x1 ,x2 ) ? and also f(x0 , x1 ) ?

Homework Equations

The Attempt at a Solution

I used the highlighted formula to find the second divided difference . But , Here's what i gt :
(0.510*0.381)-(0.521*0.510) / (2.6-2.1) , I ended up getting -0.143

Do not post images; type out your work.

 

[fonseh]

Do not post images; type out your work.

It's just the notes ... For my trial , i didnt post images ...