🚧 Fin 5.1

chapter_5/test_yourself.md

@@ -4,15 +4,29 @@ Page 296
 
 1. The notation $\sum_{k = m}^{n}{a_k}$ is read "_____."
 
+The summation from $k$ equals $m$ to $n$ of $a$ sub $k$.
+
 2. The expanded form of $\sum_{k = m}^{n}{a_k}$ is _____.
 
+$$ a_m + a_{m + 1} + a_{m + 2} + \dots + a_n $$
+
 3. The value of $a_1 + a_2 + a_3 + \dots + a_n$ when $n = 2$ is "_____."
 
+$$ a_1 + a_2 $$
+
 4. The notation $\prod_{k = m}^{n}{a_k}$ is read "_____."
 
+The product from $k$ equals $m$ to $n$ of $a$ sub $k$.
+
 5. If $n$ is a positive integer, then $n! =$ _____.
 
+$$ n \cdot (n - 1) \dots \cdot 3 \cdot 2 \cdot 1 $$
+
 6. $\sum_{k = m}^{n}{a_k} + c\sum_{k = m}^{n}{b_k} =$ _____.
 
+$$ \sum_{k = m}^{n}{a_k + cb_k} $$
+
 7. $\left(\prod_{k = m}^{n}{a_k}\right)\left(\prod_{k = m}^{n}{b_k}\right) =$
    _____.
+
+$$ \prod_{k = m}^{n}{a_kb_k} $$