解答 - 几何数列

要找到系列的通用形式，将第一项：$$a=0$$ 和公比：$$r=\infty$$ 插入几何级数的公式：

$$a_1=0$$

$$a_2=a_1·r^{n-1}=0\cdot {\infty }^{2-1}=0\cdot {\infty }^1=0\cdot \infty =NaN$$

$$a_3=a_1·r^{n-1}=0\cdot {\infty }^{3-1}=0\cdot {\infty }^2=0\cdot \infty =NaN$$

$$a_4=a_1·r^{n-1}=0\cdot {\infty }^{4-1}=0\cdot {\infty }^3=0\cdot \infty =NaN$$

$$a_5=a_1·r^{n-1}=0\cdot {\infty }^{5-1}=0\cdot {\infty }^4=0\cdot \infty =NaN$$

$$a_6=a_1·r^{n-1}=0\cdot {\infty }^{6-1}=0\cdot {\infty }^5=0\cdot \infty =NaN$$

$$a_7=a_1·r^{n-1}=0\cdot {\infty }^{7-1}=0\cdot {\infty }^6=0\cdot \infty =NaN$$

$$a_8=a_1·r^{n-1}=0\cdot {\infty }^{8-1}=0\cdot {\infty }^7=0\cdot \infty =NaN$$

$$a_9=a_1·r^{n-1}=0\cdot {\infty }^{9-1}=0\cdot {\infty }^8=0\cdot \infty =NaN$$

$$a_{10}=a_1·r^{n-1}=0\cdot {\infty }^{10-1}=0\cdot {\infty }^9=0\cdot \infty =NaN$$