Display graphic based on page

I have a special header image I want to use on the main search results page, and a different one I want to use on all of the other result page.

So far, the search is good, and the proper (main) image loads. I am using pagination (built in) and I just want to know if the current page is page 2, 3, 4, etc., so I cn load the secondary image.

Is there a quick and dirty way to do this w./o using a plugin?

Thanks…