Question 10

Explanation

Given the recursive equation:

We can rearrange the equation to find $a_{n+2}$:

Step 1: Find the value of $a_3$ by substituting $n = 1$. Given $a_1 = 8$ and $a_2 = -5$.

Step 2: Find the value of $a_4$ by substituting $n = 2$.

Step 3: Calculate the sum $a_3 + a_4$.

So, the value of $a_3 + a_4$ is $34$.