Question 1197285
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Note that, technically, the question can't be answered, because there are an infinite number of sequences whose first three terms are 18, 12, and 8.  The correct statement of the problem is<br>
Find the sum to infinity of the following <b>GEOMETRIC</b> sequence : 18, 12, 8, . . .<br>
What do you need help with on this problem?  There is a simple formula for the sum of an infinite geometric sequence:<br>
(first term) divided by (1 minus the common ratio)<br>
You are given the first term; to find the common ratio, divide the 2nd term by the 1st (or the 3rd term by the 2nd).<br>
Then do the simple arithmetic.<br>
If you are having trouble doing that, then re-post the question, telling (as you are instructed to do when making posts to this forum) exactly what it is about the problem that you need help with.<br>