Which of the following statements regarding pascal's triangle are correct? a. the first and last numbers of a row are always 1. b. the nth row gives the coefficients in the expansion of (x+y)^n-1. c. the nth row gives the coefficients in the expansion of (x+y)^n. d. each number not at the end of a row, is the sum of the numbers that are directly to its right and left, in the row below.

Answer with explanation:

Pascal Triangle→gives coefficient of the polynomial, ,from ,n=0,1,2,3....

      1           →First row

    1      1     →Second raw

 1     2     1    →third raw

1     3     3     1   →Fourth raw

1      5    10     5    1   →Fifth row

......................

...............................

The statements regarding Pascal's triangle,which are correct is

A. The first and last numbers of a row are always 1.

B.  The nth row gives the coefficients in the expansion of (x+y)^n.

As, first row contains 1,term , second row has two terms,........nth row has n terms,which is the coefficients in the expansion of (x+y)^n.

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.

3

step-by-step explanation: