The formula $$ P_k = y_0 + k\triangledown y_o + \frac{k(k+1)}{2} \triangledown^2 y_0 + ......+\frac{k...(k + n - 1)}{n!} \triangledown^n y_0 is $$

A

Newton’s backward formula

B

Gauss forward formula

C

Gauss backward formula

D

Stirling’s formula