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微积分学示例数列和级数

计算总和

$\sum_{x = 2}^{2} - 3 x - 5$

解题步骤 1

展开 $x$ 每个取值的序列。

$- 3 \cdot 2 - 5$

解题步骤 2

化简。

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解题步骤 2.1

将 $- 3$ 乘以 $2$ 。

$- 6 - 5$

解题步骤 2.2

从 $- 6$ 中减去 $5$ 。

$- 11$

$- 11$

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数列和级数

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