The shell command<br />"/l/www/moodle/filter/tex/mimetex.linux" -e "/m/floppy/avle/moodledata/filter/tex/5aae0d9fc533c6c67eec150f76ac9124.gif" -- '\Large 
  -f_{x}(a,b)(x-a) - f_{y}(a,b)(y-b)+1\cdot (z-f(a,b))=0 \Leftrightarrow z=f(a,b) + f_{x}(a,b)(x-a) + f_{y}(a,b)(y-b).
  '<br />returned status = 126<br />
Image not found!<br />Please try the <a href="https://mycourses.aalto.fi/filter/tex/texdebug.php">debugging script</a>