米料得军出你规达记A=dfrac 1 1+dfrac 1 2+dfrac 1 3+…+dfrac 1 n.米料得军出你规达米料得军出你规达left ( 1 right )
定义:{{a}_{n}}=\dfrac{\dfrac{1}{n}}{\left( 1+\dfrac{1}{1} \right)\times \left( 1+\dfrac
Answer to: Determine whether the series is convergent or divergent. \sum_{n = 1}^\infty (-1)^n \left ( 1 - \dfrac{1}{n} \right )^n By signing up,...
Answer and Explanation:1 Given {eq}\left(1 + \dfrac{1}{n}\right)^n {/eq} Finding the first four elements. {eq}\begin{aligned} n &= 1 \\ \left(1 + \frac{1}{1}\right)^1 &=...
解比例. (1) \dfrac{1}{2}:\dfrac{1}{3}=\dfrac{1}{4}:x (2) \left(6+x\right):4=9:5 (3) \dfrac{0.75}{x}=\dfrac{3}{2} (4) \dfrac{40\%}{x}=\dfrac{120\%}{2}相关知识点: 试题来源: 解析 \dfrac{1}{6}\,;\dfrac{6}{5}\,;0.5\,;\dfrac{2}{3}. ...
分别选择一个分数,并在图中表示出来.(1)dfrac (left ( (, ) right )) (left ( (, ) right ))(2)dfrac (left
解:\( \dfrac{1}{2{x}^{3}} \),\( \dfrac{1}{6{x}^{2}\left(x-y\right)} \)的分母分别是\(2x^{3}\),\(6x^{2}(x-y)\),故最简公分母为\(6x^{3}(x-y)\).故答案为\(6x^{3}(x-y)\).反馈 收藏
解答下列各题:(1)\left( -\dfrac{1}{2} \right)\times \left( -\dfrac{2}{3} \right)\times \left( -1\dfrac{1}{4} \right)\times \left( -1\dfrac{1}{3} \right)\times \left( -1\dfrac{4}{5} \right).(2)\left( +5\dfrac{1}{2} \right)\div \left( -4\dfrac{4}...
(1)当n=4时,四边形有两条对角线,f\left(4\right)=\dfrac{1}{2}\times 4\times \left(4-3\right)=2,命题成立 (2)假设当n=k(k\geqslant 4,k\in {\mathbf{N}}^{\ast })时命题成立,即f\left(k\right)=\dfrac{1}{2}k\left(k-3\right) 那么当n=k+1时,增加一个顶点,凸多边形的对...
将杨辉三角中的每一个数\(C^{r}_{n}\)都换成分数\(\dfrac{1}{\left (n+1 \right ) C^{r}_{n}}\),就得到一个如图所示的分数三角形,称为莱布尼茨三角形.从莱布尼茨三角形可看出\(\dfrac{1}{\left (n+1 \right )C^{r}_{n} }+\dfrac{1}{\left (n+1 \right ) C^{x}...