What two numbers add up to 9409?

There are infinite combinations of two numbers that add up to 9409. Here are some examples using negative numbers:

-1 + 9410 = 9409
-2 + 9411 = 9409
-3 + 9412 = 9409
...

Here are some examples using two fractions that will add up to 9409:

9409/2 + 9409/2 = 9409
18818/3 + 9409/3 = 9409
28227/4 + 9409/4 = 9409
...

And here are some examples using two decimal numbers that will add up to 9409:

1.25 + 9407.75 = 9409
2.50 + 9406.5 = 9409
3.75 + 9405.25 = 9409
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 9409?", it may be more interesting to set some criteria to limit the result. We will set the follow criteria:

1) Only positive whole numbers can add up to 9409. (0 is not a positive or negative number and should not be included.)

2) Since a+b=29 is the same as b+a=29, we should only list it once.

Now, the answer to "What two numbers add up to 9409?" has 4704 answers:

1 + 9408 = 9409
2 + 9407 = 9409
3 + 9406 = 9409
.
.
4702 + 4707 = 9409
4703 + 4706 = 9409
4704 + 4705 = 9409

We have truncated the list above due to space, but you may be interested to know that we calculated the number of answers by dividing 9409 by 2 and then rounded down to the nearest whole number if necessary.

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