![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The arithmetic sequence is 18, 24, 30, 36, . . . .
\To find the common difference by subtracting successive terms.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=fc53f0242f660f07f486f6f1403abfd1.png\")
So, the common difference is 6.![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
Add 6 to the last term of the sequence to get the next term.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dfa645e116fc42a69b6adab5d4eabd9d.png\")
The next three terms in the sequence are 42, 48 and 54.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The next three terms in the sequence are 42, 48 and 54.