第10題
求\(\displaystyle 1\cdot 3 C_1^{16}\left(\frac{3}{4}\right)\left(\frac{1}{4}\right)^{15}+2\cdot 4\cdot C_2^{16}\left(\frac{3}{4}\right)^{2}\left(\frac{1}{4}\right)^{14}+3\cdot 5\cdot C_3^{16}\left(\frac{3}{4}\right)^{3}\left(\frac{1}{4}\right)^{13}+\ldots+16\cdot 18\cdot C_{16}^{16}\left(\frac{1}{4}\right)^{16}\)之值 。
[解答]
