If`A={1, 2, 3, 4, 5, 6} B={2, 4, 5, 6, 8, 9, 10}, "find" ADeltaB`.

Answer

To find \( A \Delta B \) (the symmetric difference of sets A and B), we can follow these steps:

### Step 1: Define the sets
We have:
- Set \( A = \{1, 2, 3, 4, 5, 6\} \)
- Set \( B = \{2, 4, 5, 6, 8, 9, 10\} \)

### Step 2: Identify the common elements
We need to find the elements that are common to both sets \( A \) and \( B \):
- Common elements: \( 2, 4, 5, 6 \)

### Step 3: Find the elements in \( A \) but not in \( B \)
Now, we will find the elements that are in \( A \) but not in \( B \):
- \( A - B = \{1, 3\} \) (since 1 and 3 are not in set B)

### Step 4: Find the elements in \( B \) but not in \( A \)
Next, we will find the elements that are in \( B \) but not in \( A \):
- \( B - A = \{8, 9, 10\} \) (since 8, 9, and 10 are not in set A)

### Step 5: Combine the results
Now, we combine the results from steps 3 and 4 to find \( A \Delta B \):
- \( A \Delta B = (A - B) \cup (B - A) = \{1, 3\} \cup \{8, 9, 10\} \)

### Step 6: Write the final answer
Thus, the symmetric difference \( A \Delta B \) is:
- \( A \Delta B = \{1, 3, 8, 9, 10\} \)