Chapter 9.7, Problem 10ES

(a) Use Pascal’s triangle given in Table 9.7.1 to compute the values of $\left({}_2^6\right),\left({}_3^6\right),\left({}_4^6\right)$ , and $\left({}_5^6\right)$ .

(b) Use the result of part (a) and Pascal’s formula to compute $\left({}_3^7\right),\left({}_4^7\right)$ , and $\left({}_5^7\right)$ .

(c) Complete the row of Pascal’s triangle that corresponds to $n=7$ .