The series is .
.
Therefore the value is .
Observe the graph : The point starts at .
The series matches the graph .
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9084c763cde868a0e690e860625876f0.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2d5c7f91f24d43137a92601a49be0346.png\")
. ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b072eb98dffbe938d64742f9339f5c01.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a827e852cb5f02de89f8f9ed0635224e.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0d25261cbf81e1c8bf5afdeff1f7b3e9.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=75f997ef023da19178d4c3a40d5fa037.png\")
: The point starts at .. ![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
.