Find the Predecessor and Successor: Complete the Sequence ⎕,9001,⎕

To solve this problem, we will determine the predecessor and successor of the number 9001 by using simple arithmetic operations.

• Step 1: Calculate the predecessor of 9001.
• Step 2: Calculate the successor of 9001.

Now, let's work through each step:

Step 1: Calculate the predecessor of 9001. The predecessor of a number is found by subtracting 1 from the number. Therefore,

$9001 - 1 = 9000$.

Step 2: Calculate the successor of 9001. The successor of a number is found by adding 1 to the number. Therefore,

$9001 + 1 = 9002$.

Thus, the predecessor and successor of 9001 are $9000$ and $9002$, respectively. Therefore, in the given format, the answer is:

$9000,9001,9002$.

Matching this with the provided choices, the correct choice is:

$9000,9002$