2 Answers

Instructions
Graphics Software

1
Launch your graphics editing software and open the PDF you intend to convert. Graphics editing programs include Adobe Photoshop and CorelDRAW, as well as the freeware editor GIMP.

2
Click "File" and then "Save As."

3
Choose "JPG" under the "File Type" drop-down menu.

4
Click "Save." Your software will now convert the PDF into a JPG. It may also warn you that there will be a reduction in quality. If it does, click "OK" or "Continue."

Zamzar

5
Go to Zamzar.com.

6
Click "Choose File" and then choose your PDF.

7
Select "jpg" under "Step 2."

8
Enter your email address into "Step 3."

9 
Click "Convert." The JPG will now be sent to your email. 

http://www.ehow.com/how_6085154_change-pdf-jpeg.html

first off all we go to the option file and click the pdf to jpg converter....and also the convert.