and .
Find the common difference.
Formula for term of arithmetic sequence is .
Substitute , and in term.
Common difference of the sequence is .
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and ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d455c42e25acd7d7c7d918f919d672f2.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3a5b780550aba117a9d74bbc365a2380.png\")
term of arithmetic sequence is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7fb0b34bde81394c7f61b426cd1f8a24.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1b1acbfe9c7ddb9b68872c052fe0abb9.png\")
, and ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1539a0e534501686e559ec75ccd0709d.png\")
in term.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f77d405806186a74927ffd483132d4f4.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=abf75bc75345cdf95c4bcfe739908cb8.png\")
.![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
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.