Simple Indices Question

[keen cave]

To find a+b

[knotty scroll]

1. Ask your question and show the work you've done so far. If you've posted a screenshot of a question, specify which part you need help with.
2. Wait patiently for a helper to come along.
3. Once someone helps you, say thank you and close the thread with:

   +close
   

4. Feel free to nominate the person for helper of the week in #helper-nominations
5. Do not ping the mods, unless someone is breaking the rules.
6. If you're happy with the help you got here, and the server overall, you can contribute financially as well:

[keen cave]

I found the answer

is this correct

[haughty silo]

yea

[torn grove]

There are supposed to be more conditions on a and b
Otherwise other pairs also satisfy the equation, e.g. (a, b) = (6, 256)