Program to print binomial expansion series | function to print the series ; Calculating and printing first term ; Computing and printing remaining terms ; Find current term using previous terms We increment power of X by 1 , decrement power of A by 1 and compute nCi using previous term by multiplying previous term with ( n - i + 1 ) / i ; Driver Code
< ? php function series ( $ A , $ X , $ n ) { $ term = pow ( $ A , $ n ) ; echo $ term , " " ; for ( $ i = 1 ; $ i <= $ n ; $ i ++ ) { $ term = $ term * $ X * ( $ n - $ i + 1 ) / ( $ i * $ A ) ; echo $ term , " " ; } } $ A = 3 ; $ X = 4 ; $ n = 5 ; series ( $ A , $ X , $ n ) ; ? >